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C++面向对象程序设计课后答案(谭浩强)

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C面向对象程序设计课后习题答案第版谭浩强

C面向对象程序设计课后习题答案第版谭浩强

C面向对象程序设计课后习题答案第版谭浩强文件排版存档编号：[UYTR-OUPT28-KBNTL98-UYNN208]第六章课后习题答案（第二版谭浩强）1://xt6-1/cpp#include <iostream> //如用VC++应改为∶#include <iosttram.h>using namespace std; //如用VC++应取消此行#include "cylinder.h"#include "point.cpp"#include "circle.cpp"#include "cylinder.cpp"int main(){Cylinder cy1(3.5,6.4,5.2,10);cout<<"\noriginal cylinder:\nx="<<cy1.getX()<<",y="<<cy1.getY()<<", r="<<cy1.getRadius()<<",h="<<cy1.getHeight()<<"\narea="<<cy1.area()<<", volume="<<cy1.volume()<<endl;cy1.setHeight(15);cy1.setRadius(7.5);cy1.setPoint(5,5);cout<<"\nnew cylinder:\n"<<cy1;Point &pRef=cy1;cout<<"\npRef as a point:"<<pRef;Circle &cRef=cy1;cout<<"\ncRef as a Circle:"<<cRef;return 0;}3:解法一#include <iostream>using namespace std;class Point{public:Point(float a,float b):x(a),y(b){}~Point(){cout<<"executing Point destructor"<<endl;} private:float x;float y;};class Circle:public Point{public:Circle(float a,float b,float r):Point(a,b),radius(r){} ~Circle(){cout<<"executing Circle destructor"<<endl;} private:float radius;};int main(){Point *p=new Circle(2.5,1.8,4.5);delete p;return 0;}3：解法二#include <iostream>using namespace std;class Point{public:Point(float a,float b):x(a),y(b){}~Point(){cout<<"executing Point destructor"<<endl;} private:float x;float y;};class Circle:public Point{public:Circle(int a,int b,int r):Point(a,b),radius(r){}~Circle(){cout<<"executing Circle destructor"<<endl;}private:float radius;};int main(){Point *p=new Circle(2.5,1.8,4.5);Circle *pt=new Circle(2.5,1.8,4.5);delete pt;return 0;}3：解法三#include <iostream>using namespace std;class Point{public:Point(float a,float b):x(a),y(b){}virtual ~Point(){cout<<"executing Point destructor"<<endl;} private:float x;float y;};class Circle:public Point{public:Circle(float a,float b,float r):Point(a,b),radius(r){}virtual ~Circle(){cout<<"executing Circle destructor"<<endl;} private:float radius;};void main(){Point *p=new Circle(2.5,1.8,4.5);delete p;}4：#include <iostream>using namespace std;//定义抽象基类Shapeclass Shape{public:virtual double area() const =0; //纯虚函数};//定义Circle类class Circle:public Shape{public:Circle(double r):radius(r){} //结构函数virtual double area() const {return 3.14159*radius*radius;}; //定义虚函数protected:double radius; //半径};//定义Rectangle类class Rectangle:public Shape{public:Rectangle(double w,double h):width(w),height(h){} //结构函数virtual double area() const {return width*height;} //定义虚函数protected:double width,height; //宽与高};class Triangle:public Shape{public:Triangle(double w,double h):width(w),height(h){} //结构函数virtual double area() const {return 0.5*width*height;} //定义虚函数protected:double width,height; //宽与高};//输出面积的函数void printArea(const Shape &s){cout<<s.area()<<endl;} //输出s的面积int main(){Circle circle(12.6); //建立Circle类对象circlecout<<"area of circle =";printArea(circle); //输出circle的面积Rectangle rectangle(4.5,8.4); //建立Rectangle类对象rectanglecout<<"area of rectangle ="; printArea(rectangle); //输出rectangle的面积Triangle triangle(4.5,8.4); //建立Triangle类对象cout<<"area of triangle =";printArea(triangle); //输出triangle的面积return 0;}5：#include <iostream>using namespace std;//定义抽象基类Shapeclass Shape{public:virtual double area() const =0; //纯虚函数};//定义Circle(圆形)类class Circle:public Shape{public:Circle(double r):radius(r){} //结构函数virtual double area() const {return 3.14159*radius*radius;}; //定义虚函数protected:double radius; //半径};//定义Square(正方形)类class Square:public Shape{public:Square(double s):side(s){} //结构函数virtual double area() const {return side*side;} //定义虚函数protected:double side;};//定义Rectangle(矩形)类class Rectangle:public Shape{public:Rectangle(double w,double h):width(w),height(h){}//结构函数virtual double area() const {return width*height;}//定义虚函数protected:double width,height;//宽与高};//定义Trapezoid(梯形)类class Trapezoid:public Shape{public:Trapezoid(double t,double b,doubleh):top(t),bottom(t),height(h){} //结构函数virtual double area() const {return 0.5*(top+bottom)*height;} //定义虚函数protected:double top,bottom,height; //上底、下底与高};//定义Triangle(三角形)类class Triangle:public Shape{public:Triangle(double w,double h):width(w),height(h){} //结构函数virtual double area()const {return 0.5*width*height;} //定义虚函数protected:double width,height; //宽与高};int main(){Circle circle(12.6); //建立Circle类对象circleSquare square(3.5); //建立Square类对象squareRectangle rectangle(4.5,8.4); //建立Rectangle类对象rectangleTrapezoid trapezoid(2.0,4.5,3.2); //建立Trapezoid类对象trapezoidTriangle triangle(4.5,8.4); //建立Triangle类对象Shape *pt[5]={&circle,&square,&rectangle,&trapezoid,&triangle};//定义基类指针数组pt，使它每一个元素指向一个派生类对象double areas=0.0; //areas为总面积for(int i=0;i<5;i++){areas=areas+pt[i]->area();}cout<<"totol of all areas="<<areas<<endl; //输出总面积return 0;}。

c--面向对象程序设计课后习题解答-谭浩强

c--面向对象程序设计课后习题解答-谭浩强

第1章C++ 的初步知识1．请根据你的了解，叙述C++的特点。

C++对C有哪些发展？【解】略。

2．一个C++的程序是由哪几部分构成的?其中的每一部分起什么作用？【解】略。

3．从拿到一个任务到得到最终结果，一般要经过几个步骤？【解】略.4．请说明编辑、编译、连接的作用。

在编译后得到的目标文件为什么不能直接运行？【解】编译是以源程序文件为单位进行的,而一个完整的程序可能包含若干个程序文件，在分别对它们编译之后，得到若干个目标文件（后缀一般为.obj),然后要将它们连接为一个整体.此外，还需要与编译系统提供的标准库相连接，才能生成一个可执行文件（后缀为。

exe)。

不能直接运行后缀为。

obj的目标文件，只能运行后缀为。

exe的可执行文件.5．分析下面程序运行的结果。

#includeusing namespace std；int main({cout<<” This "<〈” is "；cout〈<” a "<<” C++”;cout〈〈”program。

” <〈 endl;return 0;}【解】输出的结果为Thisisa C++program。

6．分析下面程序运行的结果。

#includeusing namespace std；int main（｛int a,b,c;a=10；b=23；c=a+b；cout〈〈” a+b=”;cout<cout<return 0；}【解】前两个cout语句在输出数据后不换行，第3个cout语句输出一个换行,因此输出的结果为a+b=337．分析下面程序运行的结果.请先阅读程序写出程序运行时应输出的结果，然后上机运行程序，验证自己分析的结果是否正确.以下各题同。

#includeusing namespace std；int main(｛int a,b，c;int f(int x,int y，int z;cin〉>a〉〉b>>c；c=f（a，b,c;cout<}int f（int x，int y，int z｛int m;if (xelse m=y;if (zreturn（m；}【解】程序的作用是：输入3个整数，然后输出其中值最小的数。

c++面向对象程序的设计课后习题答案(谭浩强版)

c++面向对象程序的设计课后习题答案(谭浩强版)

第一章5:#include <iostream> using namespace std;int main(){cout<<"This"<<"is"; cout<<"a"<<"C++"; cout<<"program."<<endl; return 0;}6:#include <iostream> using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<endl; return 0;}7:#include <iostream> using namespace std; int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl; return 0;}int f(int x,int y,int z) {int m;if (x<y) m=x;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream> using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;sort(x,y,z);return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} //{ }内3个语句的作用是将x和y的值互换) if (z<x) cout<<z<<','<<x<<','<<y<<endl;else if (z<y) cout<<x<<','<<z<<','<<y<<endl;else cout<<x<<','<<y<<','<<z<<endl;}11:#include <iostream>using namespace std;int main(){int max(int a,int b,int c=0);int a,b,c;cin>>a>>b>>c;cout<<"max(a,b,c)="<<max(a,b,c)<<endl;cout<<"max(a,b)="<<max(a,b)<<endl;return 0;}int max(int a,int b,int c){if(b>a) a=b;if(c>a) a=c;return a;}12:#include <iostream>using namespace std;int main(){void change(int ,int );int a,b;cin>>a>>b;if(a<b) change(a,b);cout<<"max="<<a<<" min="<<b<<endl; return 0;}void change(int ,int ){int r1,r2,temp;temp=r1;r1=r2;r2=temp;}13:#include <iostream>using namespace std;int main(){void sort(int &,int &,int &);int a,b,c,a1,b1,c1;cout<<"Please enter 3 integers:";cin>>a>>b>>c;a1=a;b1=b;c1=c;sort(a1,b1,c1);cout<<a<<" "<<b<<" "<<c<<" in sorted order is "; cout<<a1<<" "<<b1<<" "<<c1<<endl;return 0;}void sort(int &i,int &j,int &k){ void change(int &,int &);if (i>j) change(i,j);if (i>k) change(i,k);if (j>k) change(j,k);}void change(int &x,int &y){ int temp;temp=x;x=y;y=temp;}14:#include <iostream>#include <string>using namespace std;int main(){ string s1="week",s2="end";cout<<"s1="<<s1<<endl;cout<<"s2="<<s2<<endl;s1=s1+s2;cout<<"The new string is:"<<s1<<endl; return 0;}15:#include <iostream>#include <string>using namespace std;int main(){ string str;int i,n;char temp;cout<<"please input a string:";cin>>str;n=str.size();for(i=0;i<n/2;i++){temp=str[i];str[i]=str[n-i-1];str[n-i-1]=temp;} cout<<str<<endl;return 0;}16:#include <iostream>#include <string>using namespace std;int main(){ int i;string str[5]={"BASIC","C","FORTRAN","C++","PASCAL"}; void sort(string []);sort(str);cout<<"the sorted strings :"<<endl;for(i=0;i<5;i++)cout<<str[i]<<" ";cout<<endl;return 0;}void sort(string s[]){int i,j;string t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (s[i]>s[i+1]){t=s[i];s[i]=s[i+1];s[i+1]=t;}}17: #include <iostream>#include <string>using namespace std;int main(){long c[5]={10100,-123567, 1198783,-165654, 3456}; int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };void sort(int []);void sort(float []);void sort(long []);sort(a);sort(b);sort(c);return 0;}void sort(int a[]){int i,j,t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(long a[]){int i,j;long t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(float a[]){int i,j;float t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}18: #include <iostream>#include <string>using namespace std;template <typename T>void sort(T a[]){int i,j,min;T t;for(i=0;i<5;i++){min=i;for (j=i+1;j<5;j++)if(a[min]>a[j]) min=j;t=a[i]; a[i]=a[min]; a[min]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}int main(){ int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };long c[5]={10100,-123567, 1198783,-165654, 3456}; sort(a);sort(b);sort(c);return 0;}第二章1#include <iostream>using namespace std;class Time{public:void set_time();void show_time();private: //成员改为公用的int hour;int minute;int sec;};void Time::set_time() //在main函数之前定义{cin>>hour;cin>>minute;cin>>sec;}void Time::show_time() //在main函数之前定义{cout<<hour<<":"<<minute<<":"<<sec<<endl; }int main(){Time t1;t1.set_time();t1.show_time();return 0;}2：#include <iostream>using namespace std;class Time{public:void set_time(void){cin>>hour;cin>>minute;cin>>sec;}void show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}private: int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}3：#include <iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);private:int hour;int minute;int sec;};void Time::set_time(void){cin>>hour;cin>>minute;cin>>sec;}void Time::show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}Time t;int main(){ t.set_time();t.show_time();return 0;}4：//xt2-4-1.cpp(main.cpp)#include <iostream>using namespace std;#include "xt2-4.h"int main(){Student stud;stud.set_value();stud.display();return 0;}//xt2-4-2.cpp(即student.cpp)#include "xt2-4.h" //在此文件中进行函数的定义#include <iostream>using namespace std; //不要漏写此行void Student::display( ){ cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void Student::set_value(){ cin>>num;cin>>name;cin>>sex;}5：//xt2-5-1.cpp(file1.cpp)#include <iostream>#include "xt2-5.h"int main(){Array_max arrmax; arrmax.set_value(); arrmax.max_value(); arrmax.show_value(); return 0;}//xt2-5-2.cpp(arraymax.cpp) #include <iostream> using namespace std;#include "xt2-5.h"void Array_max::set_value() { int i;for (i=0;i<10;i++)cin>>array[i];}void Array_max::max_value() {int i;max=array[0];for (i=1;i<10;i++)if(array[i]>max) max=array[i]; }void Array_max::show_value() {cout<<"max="<<max<<endl; }6：解法一#include <iostream>using namespace std;class Box{public:void get_value();float volume();void display();public:float lengh;float width;float height;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}int main(){Box box1,box2,box3;box1.get_value();cout<<"volmue of bax1 is "; box1.display();box2.get_value();cout<<"volmue of bax2 is "; box2.display();box3.get_value();cout<<"volmue of bax3 is "; box3.display();return 0;}解法二：#include <iostream>using namespace std;class Box{public:void get_value();void volume();void display();public:float lengh;float width;float height;float vol;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}void Box::volume(){ vol=lengh*width*height;}void Box::display(){ cout<<vol<<endl;}int main(){Box box1,box2,box3;box1.get_value();box1.volume();cout<<"volmue of bax1 is ";box1.display();box2.get_value();box2.volume();cout<<"volmue of bax2 is "; box2.display();box3.get_value();box3.volume();cout<<"volmue of bax3 is "; box3.display();return 0;}第三章2:#include <iostream>using namespace std;class Date{public:Date(int,int,int);Date(int,int);Date(int);Date();void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }Date::Date(int m,int d):month(m),day(d){year=2005;}Date::Date(int m):month(m){day=1;year=2005;}Date::Date(){month=1;day=1;year=2005;}void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}3:#include <iostream>using namespace std;class Date{public:Date(int=1,int=1,int=2005);void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}4:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){} void display();private:int num;float score;};void Student::display(){cout<<num<<" "<<score<<endl;}int main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};Student *p=stud;for(int i=0;i<=2;p=p+2,i++)p->display();return 0;}5:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}int num;float score;};void main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5),Student(104,100.0),Student(105,95.5)};void max(Student* );Student *p=&stud[0];max(p);}void max(Student *arr){float max_score=arr[0].score;int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;} cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;}int num;float score;};int main(){Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}//可改为:void display() const {cout<<num<<" "<<score<<endl;}int num;float score;};int main(){const Studentstud(101,78.5);stud.display();//stud.change(101,80.5);stud.display();return 0;}解法二：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) const {num=n;score=s;}void display() const {cout<<num<<" "<<score<<endl;} private:mutable int num;mutable float score;};int main(){const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}解法三：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}private:int num;float score;};int main(){Student stud(101,78.5);Student *p=&stud;p->display();p->change(101,80.5);p->display();return 0;}8：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}private:int num;float score;};int main() {Student stud(101,78.5); void fun(Student&); fun(stud);return 0;}void fun(Student &stu) {stu.display();stu.change(101,80.5); stu.display();}9：#include <iostream> using namespace std;class Product{public:Product(int n,int q,float p):num(n),quantity(q),price(p){};void total();static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;};void Product::total(){float rate=1.0;if(quantity>10) rate=0.98*rate;sum=sum+quantity*price*rate*(1-discount);n=n+quantity;}void Product::display(){cout<<sum<<endl;cout<<average()<<endl;}float Product::average(){return(sum/n);}float Product::discount=0.05;float Product::sum=0;int Product::n=0;int main(){Product Prod[3]={Product(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) };for(int i=0;i<3;i++)Prod[i].total();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl; }int main(){Time t1(10,13,56); Date d1(12,25,2004); display(d1,t1); return 0;}11：#include <iostream> using namespace std; class Time;class Date {public:Date(int,int,int);friend Time; private:int month;int day;int year;Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);t1.display(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)?x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)?x:y;}int main(){Compare<int> cmp1(3,7);cout<<cmp1.max()<<" is the Maximum of two integer numbers."<<endl;cout<<cmp1.min()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2(45.78,93.6);cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl; Compare<char> cmp3('a','A');cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;} double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2){return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag()); }int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";c3.display();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;} Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2) {Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}Complex Complex::operator-(Complex &c2) {Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";c3.display();c3=c1-c2;cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}3:#include <iostream> //用VC++时改为∶#include <iostream.h> using namespace std; //用VC++时为取消此行class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator+(int &i);friend Complex operator+(int&,Complex &);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c) {return Complex(real+c.real,imag+c.imag);}Complex Complex::operator+(int &i) {return Complex(real+i,imag);}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator+(int &i,Complex &c) {return Complex(i+c.real,c.imag);}int main(){Complex c1(3,4),c2(5,-10),c3;int i=5;c3=c1+c2;cout<<"c1+c2=";c3.display();。

C 面向对象程序设计课后答案(谭浩强)

C 面向对象程序设计课后答案(谭浩强)

C++面向对象程序设计课后答案(1-4章)第一章：面向对象程序设计概述[1_1]什么是面向对象程序设计？面向对象程序设计是一种新型的程序设计范型。

这种范型的主要特征是：程序=对象+消息。

面向对象程序的基本元素是对象，面向对象程序的主要结构特点是：第一：程序一般由类的定义和类的使用两部分组成，在主程序中定义各对象并规定它们之间传递消息的规律。

第二：程序中的一切操作都是通过向对象发送消息来实现的，对象接受到消息后，启动有关方法完成相应的操作。

面向对象程序设计方法模拟人类习惯的解题方法，代表了计算机程序设计新颖的思维方式。

这种方法的提出是软件开发方法的一场革命，是目前解决软件开发面临困难的最有希望、最有前途的方法之一。

[1_2]什么是类？什么是对象？对象与类的关系是什么？在面向对象程序设计中，对象是描述其属性的数据以及对这些数据施加的一组操作封装在一起构成的统一体。

对象可以认为是：数据+操作在面向对象程序设计中，类就是具有相同的数据和相同的操作的一组对象的集合，也就是说，类是对具有相同数据结构和相同操作的一类对象的描述。

类和对象之间的关系是抽象和具体的关系。

类是多个对象进行综合抽象的结果，一个对象是类的一个实例。

在面向对象程序设计中，总是先声明类，再由类生成对象。

类是建立对象的“摸板”，按照这个摸板所建立的一个个具体的对象，就是类的实际例子，通常称为实例。

[1_3]现实世界中的对象有哪些特征？请举例说明。

对象是现实世界中的一个实体，其具有以下一些特征：（1）每一个对象必须有一个名字以区别于其他对象。

（2）需要用属性来描述它的某些特性。

（3）有一组操作，每一个操作决定了对象的一种行为。

（4）对象的操作可以分为两类：一类是自身所承受的操作，一类是施加于其他对象的操作。

例如：雇员刘名是一个对象对象名：刘名对象的属性：年龄：36 生日：1966.10.1 工资：2000 部门：人事部对象的操作：吃饭开车[1_4]什么是消息？消息具有什么性质？在面向对象程序设计中，一个对象向另一个对象发出的请求被称为“消息”。

c程序设计谭浩强习题答案

c程序设计谭浩强习题答案

c程序设计谭浩强习题答案C程序设计是计算机科学与技术专业学生必修的一门课程，谭浩强教授编写的《C程序设计》教材广泛用于教学中，其习题集也是学生学习过程中不可或缺的练习材料。

以下是针对该教材习题的一些参考答案，供参考使用。

第一章：C语言概述1. 问题1：解释C语言的特点。

- 答案：C语言是一种通用的、过程式的编程语言，具有以下特点：简洁、高效、可移植性高、结构化、支持多种编程范式等。

2. 问题2：C语言的发展历史。

- 答案：C语言由丹尼斯·里奇在1972年开发，最初用于UNIX操作系统的编写。

随着UNIX系统的流行，C语言也逐渐被广泛使用并发展。

第二章：数据类型、运算符和表达式1. 问题1：C语言中基本数据类型有哪些？- 答案：C语言中的基本数据类型包括整型（int）、字符型（char）、浮点型（float和double）等。

2. 问题3：解释运算符的优先级。

- 答案：运算符优先级决定了表达式中各运算符的计算顺序。

例如，乘除运算符优先于加减运算符。

第三章：控制语句1. 问题1：解释if语句的用法。

- 答案：if语句用于条件判断，根据条件是否为真来决定执行不同的代码块。

2. 问题2：while循环和for循环的区别是什么？- 答案：while循环在每次迭代前检查条件，而for循环在循环开始前初始化，然后在每次迭代后检查条件。

第四章：数组1. 问题1：一维数组和多维数组的区别。

- 答案：一维数组是线性的，只有一个索引；多维数组可以看作是数组的数组，具有多个索引。

2. 问题2：数组的初始化方法。

- 答案：数组可以通过赋值语句逐个初始化，或者使用初始化列表在声明时初始化。

第五章：指针1. 问题1：指针是什么？- 答案：指针是一种变量，它存储了另一个变量的内存地址。

2. 问题2：指针和数组的关系。

- 答案：数组名可以作为指向数组首元素的指针使用，指针可以用于遍历数组。

第六章：函数1. 问题1：函数的定义和声明。

c程序设计第二版谭浩强课后答案

c程序设计第二版谭浩强课后答案

c程序设计第二版谭浩强课后答案C程序设计第二版是谭浩强教授编写的一本广泛使用的计算机程序设计教材，它以C语言为基础，深入浅出地介绍了程序设计的基本概念、语法规则和编程技巧。

这本书的课后习题对于加深理解C语言的知识点非常有帮助。

以下是部分课后习题的答案，供参考：第一章程序设计和C语言概述1. 问题一：简述程序设计的基本步骤。

- 答案：程序设计的基本步骤包括需求分析、设计、编码、测试和维护。

2. 问题二：C语言的主要特点是什么？- 答案：C语言的主要特点包括简洁高效、结构化、可移植性、丰富的运算符、灵活的数据类型和内存管理能力。

第二章 C语言程序的结构1. 问题一：C语言程序的基本结构是什么？- 答案：C语言程序的基本结构包括预处理指令、函数定义和主函数。

2. 问题二：什么是函数？C语言中函数的定义规则是什么？- 答案：函数是一段具有特定功能的代码块，可以被重复调用。

C 语言中函数的定义规则包括返回类型、函数名和参数列表。

第三章数据类型、运算符和表达式1. 问题一：C语言中的基本数据类型有哪些？- 答案：C语言中的基本数据类型包括整型（int）、字符型（char）、浮点型（float和double）。

2. 问题二：算术运算符有哪些？它们的优先级是怎样的？- 答案：算术运算符包括加（+）、减（-）、乘（*）、除（/）和模（%）。

它们的优先级从高到低依次是乘除、模、加减。

第四章控制语句1. 问题一：C语言中的条件语句有哪些？- 答案：C语言中的条件语句包括if语句、if...else语句和switch语句。

2. 问题二：循环语句有哪些？它们的基本结构是什么？- 答案：C语言中的循环语句包括while循环、do...while循环和for循环。

它们的基本结构是初始化、条件判断和迭代。

第五章数组1. 问题一：什么是数组？数组的声明方式有哪些？- 答案：数组是相同数据类型元素的集合。

数组的声明方式包括在函数内部声明和全局声明。

面向对象程序设计课后习题答案谭浩强版

面向对象程序设计课后习题答案谭浩强版
void change(int n,float s) {num=n;score=s;}
void display() {cout<<num<<" "<<score<<endl;}
otal();
Product::display();
return0;
}
10：
#include <iostream>
using namespace std;
{month=m;
day=d; year=y;
}
void display(const Date &d,const Time &t)
{
cout<<<<"/"<<<<"/"<<<<endl; cout<<<<":"<<<<":"<<<<endl;
int main()
{
Time t1(10,13,56);
if(arr[i].score>max_score) {max_score=arr[i].score;k=i;} cout<<arr[k].num<<" "<<max_score<<endl;
}
6:
#include <iostream>
using namespace std;
class Student
{public:
Student(int n,float s):num(n),score(s){}

c程序设计第四版谭浩强课后答案

c程序设计第四版谭浩强课后答案

c程序设计第四版谭浩强课后答案谭浩强的《C程序设计》第四版是一本广泛使用的C语言教材，它详细介绍了C语言的基本概念和编程技巧。

课后答案对于学习者来说是一个重要的参考资源，可以帮助他们检验自己的学习成果和理解程度。

以下是一些可能的课后答案的概述，但请注意，由于具体问题和答案可能因版本和出版社的不同而有所变化，以下内容仅供参考。

第一章：C语言概述- 问题1：C语言的主要特点是什么？答案：C语言是一种结构化语言，具有高级语言的特点，同时具备汇编语言的许多功能。

它具有可移植性、简洁性、高效性等特点。

- 问题2：C语言的发展历史是什么？答案：C语言由丹尼斯·里奇在20世纪70年代初期开发，最初用于UNIX操作系统的编写。

随着UNIX操作系统的普及，C语言也逐渐流行起来。

第二章：数据类型、运算符和表达式- 问题1：C语言中的基本数据类型有哪些？答案：C语言中的基本数据类型包括整型（int）、字符型（char）、浮点型（float）和双精度型（double）。

- 问题2：什么是运算符优先级？答案：运算符优先级决定了在表达式中不同运算符的执行顺序。

例如，乘法和除法的优先级高于加法和减法。

第三章：控制语句- 问题1：C语言中的控制语句有哪些？答案：C语言中的控制语句包括条件语句（if、switch）、循环语句（for、while、do-while）和跳转语句（break、continue、return、goto）。

- 问题2：for循环的基本结构是什么？答案：for循环的基本结构是：```cfor (初始化表达式；条件表达式；迭代表达式) {// 循环体}```第四章：数组- 问题1：一维数组的声明和初始化方式有哪些？答案：一维数组的声明方式是指定数组名和数据类型，初始化方式可以是静态初始化或动态初始化。

- 问题2：多维数组与一维数组有什么区别？答案：多维数组可以看作是数组的数组，具有多个索引维度，而一维数组只有一个索引维度。

c 面向对象程序设计课后习题答案(谭浩强版)

c 面向对象程序设计课后习题答案(谭浩强版)

第一章5:#include <iostream> using namespace std;int main(){cout<<"This"<<"is"; cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream> using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream> using namespace std;int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z){int m;else m=y;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} //{ }内3个语句的作用是将x和y的值互换) if (z<x) cout<<z<<','<<x<<','<<y<<endl;else if (z<y) cout<<x<<','<<z<<','<<y<<endl;else cout<<x<<','<<y<<','<<z<<endl;}11:#include <iostream>using namespace std;int main(){int max(int a,int b,int c=0);int a,b,c;cin>>a>>b>>c;cout<<"max(a,b,c)="<<max(a,b,c)<<endl;cout<<"max(a,b)="<<max(a,b)<<endl;return 0;}int max(int a,int b,int c){if(b>a) a=b;if(c>a) a=c;return a;}12:#include <iostream>using namespace std;int main(){void change(int ,int );int a,b;cin>>a>>b;if(a<b) change(a,b);cout<<"max="<<a<<" min="<<b<<endl;return 0;}void change(int ,int ){int r1,r2,temp;temp=r1;r1=r2;r2=temp;}13:#include <iostream>using namespace std;int main(){void sort(int &,int &,int &);int a,b,c,a1,b1,c1;cout<<"Please enter 3 integers:";cin>>a>>b>>c;a1=a;b1=b;c1=c;sort(a1,b1,c1);cout<<a<<" "<<b<<" "<<c<<" in sorted order is "; cout<<a1<<" "<<b1<<" "<<c1<<endl;return 0;}void sort(int &i,int &j,int &k){ void change(int &,int &);if (i>j) change(i,j);if (i>k) change(i,k);if (j>k) change(j,k);}void change(int &x,int &y){ int temp;temp=x;x=y;y=temp;}14:#include <iostream>#include <string>using namespace std;int main(){ string s1="week",s2="end";cout<<"s1="<<s1<<endl;cout<<"s2="<<s2<<endl;s1=s1+s2;cout<<"The new string is:"<<s1<<endl;return 0;}15:#include <iostream>#include <string>using namespace std;int main(){ string str;int i,n;char temp;cout<<"please input a string:";cin>>str;n=str.size();for(i=0;i<n/2;i++){temp=str[i];str[i]=str[n-i-1];str[n-i-1]=temp;}cout<<str<<endl;return 0;}16:#include <iostream>#include <string>using namespace std;int main(){ int i;string str[5]={"BASIC","C","FORTRAN","C++","PASCAL"}; void sort(string []);sort(str);cout<<"the sorted strings :"<<endl;for(i=0;i<5;i++)cout<<str[i]<<" ";cout<<endl;return 0;}void sort(string s[]){int i,j;string t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (s[i]>s[i+1]){t=s[i];s[i]=s[i+1];s[i+1]=t;} }17: #include <iostream>#include <string>using namespace std;int main(){long c[5]={10100,-, ,-, 3456};int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 }; void sort(int []);void sort(float []);void sort(long []);sort(a);sort(b);sort(c);return 0;}void sort(int a[]){int i,j,t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(long a[]){int i,j;long t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(float a[]){int i,j;float t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;} cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}18: #include <iostream>#include <string>using namespace std;template <typename T>void sort(T a[]){int i,j,min;T t;for(i=0;i<5;i++){min=i;for (j=i+1;j<5;j++)if(a[min]>a[j]) min=j;t=a[i]; a[i]=a[min]; a[min]=t;}cout<<"the sorted numbers :"<<endl; for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}int main(){ int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 }; long c[5]={10100,-, ,-, 3456};sort(a);sort(b);sort(c);return 0;}第二章1#include <iostream>using namespace std;class Time{public:void set_time();void show_time();private: //成员改为公用的int hour;int minute;int sec;};void Time::set_time() //在main函数之前定义{cin>>hour;cin>>minute;cin>>sec;}void Time::show_time() //在main函数之前定义{cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1;t1.set_time();t1.show_time();return 0;}2：#include <iostream>using namespace std;class Time{public:void set_time(void){cin>>hour;cin>>minute;cin>>sec;void show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}private: int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}3：#include <iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);private:int hour;int minute;int sec;};void Time::set_time(void){cin>>hour;cin>>minute;cin>>sec;}void Time::show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}Time t;int main(){ t.set_time();t.show_time();return 0;}//xt2-4-1.cpp(main.cpp)#include <iostream>using namespace std;#include "xt2-4.h"int main(){Student stud;stud.set_value();stud.display();return 0;}//xt2-4-2.cpp(即student.cpp)#include "xt2-4.h" //在此文件中进行函数的定义#include <iostream>using namespace std; //不要漏写此行void Student::display( ){ cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void Student::set_value(){ cin>>num;cin>>name;cin>>sex;}5：//xt2-5-1.cpp(file1.cpp)#include <iostream>#include "xt2-5.h"int main(){Array_max arrmax;arrmax.set_value();arrmax.max_value();arrmax.show_value();return 0;}//xt2-5-2.cpp(arraymax.cpp)#include <iostream>using namespace std;#include "xt2-5.h"void Array_max::set_value()for (i=0;i<10;i++)cin>>array[i];}void Array_max::max_value(){int i;max=array[0];for (i=1;i<10;i++)if(array[i]>max) max=array[i];}void Array_max::show_value(){cout<<"max="<<max<<endl;}6：解法一#include <iostream>using namespace std;class Box{public:void get_value();float volume();void display();public:float lengh;float width;float height;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}{Box box1,box2,box3;box1.get_value();cout<<"volmue of bax1 is ";box1.display();box2.get_value();cout<<"volmue of bax2 is ";box2.display();box3.get_value();cout<<"volmue of bax3 is ";box3.display();return 0;}解法二：#include <iostream>using namespace std;class Box{public:void get_value();void volume();void display();public:float lengh;float width;float height;float vol;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}void Box::volume(){ vol=lengh*width*height;}void Box::display(){ cout<<vol<<endl;}int main(){Box box1,box2,box3;box1.get_value();box1.volume();cout<<"volmue of bax1 is ";box1.display();box2.get_value();box2.volume();cout<<"volmue of bax2 is ";box2.display();box3.get_value();box3.volume();cout<<"volmue of bax3 is ";box3.display();return 0;}第三章2:#include <iostream>using namespace std;class Date{public:Date(int,int,int);Date(int,int);Date(int);Date();void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }Date::Date(int m,int d):month(m),day(d){year=2005;}Date::Date(int m):month(m){day=1;year=2005;}{month=1;day=1;year=2005;}void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}3:#include <iostream>using namespace std;class Date{public:Date(int=1,int=1,int=2005);void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}4:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void display();private:int num;float score;};void Student::display(){cout<<num<<" "<<score<<endl;}int main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};Student *p=stud;for(int i=0;i<=2;p=p+2,i++)p->display();return 0;}5:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}int num;float score;};void main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};void max(Student* );Student *p=&stud[0];max(p);}void max(Student *arr){float max_score=arr[0].score;int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;} cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}//可改为:void display() const {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){const Studentstud(101,78.5);stud.display();//stud.change(101,80.5);stud.display();return 0;}解法二：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) const {num=n;score=s;}void display() const {cout<<num<<" "<<score<<endl;}private:mutable int num;mutable float score;};int main(){const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}解法三：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);Student *p=&stud;p->display();p->change(101,80.5);p->display();return 0;}8：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);void fun(Student&);fun(stud);return 0;}void fun(Student &stu){stu.display();stu.change(101,80.5);stu.display();}9：#include <iostream>using namespace std;class Product{public:Product(int n,int q,float p):num(n),quantity(q),price(p){};void total();static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;};void Product::total(){float rate=1.0;if(quantity>10) rate=0.98*rate;sum=sum+quantity*price*rate*(1-discount);n=n+quantity;}void Product::display(){cout<<sum<<endl;cout<<average()<<endl;}float Product::average(){return(sum/n);}float Product::discount=0.05;float Product::sum=0;int Product::n=0;int main(){Product Prod[3]={Product(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) };for(int i=0;i<3;i++)Prod[i].total();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl;cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);t1.display(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)?x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)?x:y;}int main(){Compare<int> cmp1(3,7);cout<<cmp1.max()<<" is the Maximum of two integer numbers."<<endl;cout<<cmp1.min()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2(45.78,93.6);cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl; Compare<char> cmp3('a','A');cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2){return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag()); }int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";c3.display();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2){Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}Complex Complex::operator-(Complex &c2){Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;cout<<"c1+c2=";c3.display();c3=c1-c2;cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}3:#include <iostream> //用VC++时改为∶#include <iostream.h> using namespace std; //用VC++时为取消此行class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator+(int &i);friend Complex operator+(int&,Complex &);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c){return Complex(real+c.real,imag+c.imag);}Complex Complex::operator+(int &i){return Complex(real+i,imag);}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator+(int &i,Complex &c){return Complex(i+c.real,c.imag);}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";c3.display();c3=i+c1;cout<<"i+c1=";c3.display();c3=c1+i;cout<<"c1+i=";c3.display();return 0;}4:#include <iostream>using namespace std;class Matrix //定义Matrix类{public:Matrix(); //默认构造函数friend Matrix operator+(Matrix &,Matrix &); //重载运算符“+”void input(); //输入数据函数void display(); //输出数据函数private:int mat[2][3];};Matrix::Matrix() //定义构造函数{for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b) //定义重载运算符“+”函数{Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}void Matrix::input() //定义输入数据函数{cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)cin>>mat[i][j];}void Matrix::display() //定义输出数据函数{for (int i=0;i<2;i++){for(int j=0;j<3;j++){cout<<mat[i][j]<<" ";}cout<<endl;}}int main(){Matrix a,b,c;a.input();b.input();cout<<endl<<"Matrix a:"<<endl;a.display();cout<<endl<<"Matrix b:"<<endl;b.display();c=a+b; //用重载运算符“+”实现两个矩阵相加cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl;c.display();return 0;}5:#include <iostream.h>//using namespace std;class Matrix{public:Matrix();friend Matrix operator+(Matrix &,Matrix &);friend ostream& operator<<(ostream&,Matrix&);friend istream& operator>>(istream&,Matrix&);private:int mat[2][3];};Matrix::Matrix(){for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b){Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}istream& operator>>(istream &in,Matrix &m){cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)in>>m.mat[i][j];return in;}ostream& operator<<(ostream &out,Matrix &m){for (int i=0;i<2;i++){for(int j=0;j<3;j++){out<<m.mat[i][j]<<" ";}out<<endl;}return out;}int main(){ Matrix a,b,c;cin>>a;cin>>b;cout<<endl<<"Matrix a:"<<endl<<a<<endl;cout<<endl<<"Matrix b:"<<endl<<b<<endl;c=a+b;cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl<<c<<endl; return 0;}6:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r){real=r;imag=0;}Complex(double r,double i){real=r;imag=i;}operator double(){return real;}void display();private:double real;double imag;};void Complex::display(){cout<<"("<<real<<", "<<imag<<")"<<endl;}int main(){Complex c1(3,4),c2;double d1;d1=2.5+c1;cout<<"d1="<<d1<<endl;c2=Complex(d1);cout<<"c2=";c2.display();return 0;}7:#include <iostream>using namespace std;class Student{public:Student(int,char[],char,float);int get_num(){return num;}char * get_name(){return name;}char get_sex(){return sex;}void display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<score<<"\n\n";} private:int num;char name[20];char sex;float score;};Student::Student(int n,char nam[],char s,float so){num=n;strcpy(name,nam);sex=s;score=so;}class Teacher{public:Teacher(){}Teacher(Student&);Teacher(int n,char nam[],char sex,float pay);void display();private:int num;char name[20];char sex;float pay;};Teacher::Teacher(int n,char nam[],char s,float p){num=n;strcpy(name,nam);sex=s;pay=p;}Teacher::Teacher(Student& stud){num=stud.get_num();strcpy(name,stud.get_name());sex=stud.get_sex();pay=1500;}void Teacher::display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\npay:"<<pay<<"\n\n";}int main(){Teacher teacher1(10001,"Li",'f',1234.5),teacher2;Student student1(20010,"Wang",'m',89.5);cout<<"student1:"<<endl;student1.display();teacher2=Teacher(student1);cout<<"teacher2:"<<endl;teacher2.display();return 0;}第五章1:#include <iostream>using namespace std;class Student。

面向对象程序设计课后习题答案谭浩强版

面向对象程序设计课后习题答案谭浩强版

第一章5:#include <iostream>using namespace std;int main(){cout<<"This"<<"is";cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream>using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream>using namespace std;int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z) {int m;if (x<y) m=x;else m=y;if (z<m) m=z;return(m);}8: #include <iostream>using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl;return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl;return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;sort(x,y,z);return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} 2-4-12-4-22-5-12-5-2Box box1Box box1core; int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;}cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;}private:int num;float score;};int main(){Student stud(101,;();(101,;();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}otal();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<<<"/"<<<<"/"<<<<endl;cout<<<<":"<<<<":"<<<<endl;int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<<<"/"<<<<"/"<<<<endl;cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)x:y;}int main(){Compare<int> cmp1(3,7);cout<<()<<" is the Maximum of two integer numbers."<<endl;cout<<()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2,;cout<<()<<" is the Maximum of two float numbers."<<endl;cout<<()<<" is the Minimum of two float numbers."<<endl<<endl;Compare<char> cmp3('a','A');cout<<()<<" is the Maximum of two characters."<<endl;cout<<()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;} double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2) {return Complex()+(),()+());}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;} Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2) {Complex c;=real+;=imag+;return c;}Complex Complex::operator-(Complex &c2) {Complex c;=;=;return c;}Complex Complex::operator*(Complex &c2) {Complex c;=real**;=imag*+real*;return c;}Complex Complex::operator/(Complex &c2) {Complex c;=(real*+imag*/*+*;=(imag**/*+*;return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";();c3=c1-c2;cout<<"c1-c2=";();c3=c1*c2;cout<<"c1*c2=";();c3=c1/c2;cout<<"c1/c2=";();return 0;}3:#include <iostream> ,"president","135 Beijing Road,Shanghai","(021)",;( );return 0;}10：#include <iostream>#include <cstring>using namespace std;class Teacher um<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl;((char *)&staf[i],sizeof(staf[i]));}cout<<"please input data you want insert:"<<endl;for(i=0;i<2;i++){cin>>>>>>>>;(0,ios::end);((char *)&staf1,sizeof(staf1));}(0,ios::beg);for(i=0;i<7;i++){((char *)&staf[i],sizeof(staf[i]));cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl;}bool find;cout<<"enter number you want search,enter 0 to stop.";cin>>num;while(num){find=false;(0,ios::beg);for(i=0;i<7;i++){((char *)&staf[i],sizeof(staf[i]));if(num==staf[i].num){m=();cout<<num<<" is No."<<m/sizeof(staf1)<<endl;cout<<staf[i].num<<" "<<staf[i].name<<" "<<staf[i].age<<" "<<staf[i].pay<<endl;find=true;break;}}if(!find)cout<<"can't find "<<num<<endl;cout<<"enter number you want search,enter 0 to stop.";cin>>num;}();return 0;}6：解法一#include <iostream>#include <strstream>using namespace std;struct student{int num;char name[20];double score;};int main(){student stud[3]={1001,"Li",78,1002,"Wang",,1004,"Fun",90},stud1[3];char c[50];int i;ostrstream strout(c,50);for(i=0;i<3;i++)strout<<stud[i].num<<" "<<stud[i].name<<" "<<stud[i].score<<" ";strout<<ends;cout<<"array c:"<<endl<<c<<endl<<endl;istrstream strin(c,50);for(i=0;i<3;i++)strin>>stud1[i].num>>stud1[i].name>>stud1[i].score;cout<<"data from array c to array stud1:"<<endl;for(i=0;i<3;i++)cout<<stud1[i].num<<" "<<stud1[i].name<<" "<<stud1[i].score<<endl;cout<<endl;return 0;}6：解法二#include <iostream>#include <strstream>using namespace std;struct student{int num;char name[20];double score;};int main(){int i;student stud[3]={1001,"Li",78,1002,"Wang",,1004,"Fun",90},stud1[3]; char c[50];strstream strio(c,50,ios::in|ios::out);for(i=0;i<3;i++)strio<<stud[i].num<<" "<<stud[i].name<<" "<<stud[i].score<<" ";strio<<ends;cout<<"array c:"<<endl<<c<<endl<<endl;for(i=0;i<3;i++)strio>>stud1[i].num>>stud1[i].name>>stud1[i].score;cout<<"data from array c to array stud1:"<<endl;for(i=0;i<3;i++)cout<<stud1[i].num<<" "<<stud1[i].name<<" "<<stud1[i].score<<endl; cout<<endl;return 0;}第八章1:#include <iostream>#include <cmath>using namespace std;double q(double,double,double);void main(){double a,b,c,p,x1,x2;cout<<"please enter a,b,c:";cin>>a>>b>>c;p=-b/(2*a);try{x1=p+q(a,b,c);x2=p-q(a,b,c);cout<<"x1="<<x1<<endl<<"x2="<<x2<<endl;}catch(double d){cout<<"a="<<a<<",b="<<b<<",c="<<c<<",disc="<<d<<",error!"<<endl;} cout<<"end"<<endl;}double q(double a,double b,double c){double disc;disc=b*b-4*a*c;if (disc<0) throw disc;return sqrt(disc)/(2*a);}2:#include <iostream>#include <string>using namespace std;class Student{public:Student(int n,string nam){cout<<"constructor-"<<n<<endl;num=n;name=nam;}~Student(){cout<<"destructor-"<<num<<endl;}void get_data();private:int num;string name;};void Student::get_data(){if(num==0) throw num;else cout<<num<<" "<<name<<endl;cout<<"in get_data()"<<endl;}void fun(){Student stud1(1101,"tan");();try{Student stud2(0,"Li");();}catch(int n){cout<<"num="<<n<<",error!"<<endl;}}int main(){cout<<"main begin"<<endl;cout<<"call fun()"<<endl;fun();cout<<"main end"<<endl;return 0;}3://main file#include <iostream>using namespace std;#include ""#include ""using namespace std;using namespace student1;int main(){Student stud1(1001,"Wang",18,"123 Beijing Road,Shanghua"); ();student2::Student stud2(1102,"Li",'f',;();return 0;}//，文件名为#include <string>namespace student1{class Student{public:Student(int n,string nam,int a,string addr){num=n;name=nam;age=a;address=addr;}void show_data();private:int num;string name;int age;string address;};void Student::show_data(){cout<<"num:"<<num<<" name:"<<name<<" age:"<<age<<" address:"<<address<<endl;}}//，文件名为#include <string>namespace student2{class Student{public:Student(int n,string nam,char s,float sco){num=n;name=nam;sex=s;score=sco;}void show_data();private:int num;string name;char sex;float score;};void Student::show_data(){cout<<"num:"<<num<<" name:"<<name<<" sex:"<<sex <<" score:"<<score<<endl; }}。

c--面向对象程序设计课后习题解答-谭浩强

c--面向对象程序设计课后习题解答-谭浩强

（5）第6行末尾少了一个分号。 （6）add函数中的retrun拼写错误，应为return。编译系统把retrun作为未声明的标识符而报错 ，因为retrun（z）会被认为是函数调用的形式。 （7）变量a和b未被赋值。 改正后的程序如下： #include using namespace std; int main( {int add(int x,int y; int a,b,c; cin >> a >> b; c=add(a,b; cout <<" a+b=" << c < return 0; } int add(int x,int y {int z; z=x+y; return(z; } 运行情况如下： 5 8↙ 13 10．输入以下程序，编译并运行，分析运行结果。 #include using namespace std; int main( { void sort(int x,int y,int z; int x,y,z;
1 5 3↙ (输入3个整数
1 (输出其中最小的数
8．在你所用的C++系统上，输入以下程序，进行编译，观察编译情况，如果有错误，请修改 程序，再进行编译，直到没有错误，然后进行连接和运行，分析运行结果。
int main( ; { int a,b; c=a+b; cout >>" a+b=" >> a+b; } 【解】 上机编译出错，编译出错信息告知在第2行出错，经检查，发现第1行的末尾多了一个分号，编译 系统无法理解第2行的花括号，导致报告第2行出错。将第1行的末尾的分号去掉，重新编译，编 译出错信息告知在第5行和第6行出错。第5行出错原因是cout未经声明，因为cout不是C++语言 提供的系统的关键字，而是输出流的对象，必须使用头文件iostream。第6行出错原因是main是i nt型函数，应返回一个整型值。将程序改为

c++面对对象程序设计课后答案(谭浩强)

c++面对对象程序设计课后答案(谭浩强)

第一章5:#include <iostream> using namespace std;int main(){cout<<"This"<<"is"; cout<<"a"<<"C++";cout<<"program."<<endl; return 0;}6:#include <iostream> using namespace std;int main(){int a,b,c;a=10;b=23;c=a+b;cout<<"a+b=";cout<<c;cout<<endl;return 0;}7:#include <iostream> using namespace std;int main(){int a,b,c;int f(int x,int y,int z); cin>>a>>b>>c;c=f(a,b,c);cout<<c<<endl;return 0;}int f(int x,int y,int z){int m;if (x<y) m=x;else m=y;if (z<m) m=z;return(m);}8: #include <iostream> using namespace std;int main(){int a,b,c;cin>>a>>b;c=a+b;cout<<"a+b="<<a+b<<endl; return 0;}9:#include <iostream>using namespace std;int main(){int add(int x,int y);int a,b,c;cin>>a>>b;c=add(a,b);cout<<"a+b="<<c<<endl; return 0;}int add(int x,int y){int c;c=x+y;return(c);}10:#include <iostream>using namespace std;int main(){void sort(int x,int y,int z); int x,y,z;cin>>x>>y>>z;sort(x,y,z);return 0;}void sort(int x, int y, int z){int temp;if (x>y) {temp=x;x=y;y=temp;} //{ }内3个语句的作用是将x和y的值互换) if (z<x) cout<<z<<','<<x<<','<<y<<endl;else if (z<y) cout<<x<<','<<z<<','<<y<<endl;else cout<<x<<','<<y<<','<<z<<endl;}11:#include <iostream>using namespace std;int main(){int max(int a,int b,int c=0);int a,b,c;cin>>a>>b>>c;cout<<"max(a,b,c)="<<max(a,b,c)<<endl;cout<<"max(a,b)="<<max(a,b)<<endl;return 0;}int max(int a,int b,int c){if(b>a) a=b;if(c>a) a=c;return a;}12:#include <iostream>using namespace std;int main(){void change(int ,int );int a,b;cin>>a>>b;if(a<b) change(a,b);cout<<"max="<<a<<" min="<<b<<endl;return 0;}void change(int ,int ){int r1,r2,temp;temp=r1;r1=r2;r2=temp;}13:#include <iostream>using namespace std;int main(){void sort(int &,int &,int &);int a,b,c,a1,b1,c1;cout<<"Please enter 3 integers:";cin>>a>>b>>c;a1=a;b1=b;c1=c;sort(a1,b1,c1);cout<<a<<" "<<b<<" "<<c<<" in sorted order is "; cout<<a1<<" "<<b1<<" "<<c1<<endl;return 0;}void sort(int &i,int &j,int &k){ void change(int &,int &);if (i>j) change(i,j);if (i>k) change(i,k);if (j>k) change(j,k);}void change(int &x,int &y){ int temp;temp=x;x=y;y=temp;}14:#include <iostream>#include <string>using namespace std;int main(){ string s1="week",s2="end";cout<<"s1="<<s1<<endl;cout<<"s2="<<s2<<endl;s1=s1+s2;cout<<"The new string is:"<<s1<<endl;return 0;}15:#include <iostream>#include <string>using namespace std;int main(){ string str;int i,n;char temp;cout<<"please input a string:";cin>>str;n=str.size();for(i=0;i<n/2;i++){temp=str[i];str[i]=str[n-i-1];str[n-i-1]=temp;}cout<<str<<endl;return 0;}16:#include <iostream>#include <string>using namespace std;int main(){ int i;string str[5]={"BASIC","C","FORTRAN","C++","PASCAL"}; void sort(string []);sort(str);cout<<"the sorted strings :"<<endl;for(i=0;i<5;i++)cout<<str[i]<<" ";cout<<endl;return 0;}void sort(string s[]){int i,j;string t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (s[i]>s[i+1]){t=s[i];s[i]=s[i+1];s[i+1]=t;}}17: #include <iostream>#include <string>using namespace std;int main(){long c[5]={10100,-123567, 1198783,-165654, 3456}; int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };void sort(int []);void sort(float []);void sort(long []);sort(a);sort(b);sort(c);return 0;}void sort(int a[]){int i,j,t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(long a[]){int i,j;long t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}void sort(float a[]){int i,j;float t;for (j=0;j<5;j++)for(i=0;i<5-j;i++)if (a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}18: #include <iostream>#include <string>using namespace std;template <typename T>void sort(T a[]){int i,j,min;T t;for(i=0;i<5;i++){min=i;for (j=i+1;j<5;j++)if(a[min]>a[j]) min=j;t=a[i]; a[i]=a[min]; a[min]=t;}cout<<"the sorted numbers :"<<endl;for(i=0;i<5;i++)cout<<a[i]<<" ";cout<<endl<<endl;}int main(){ int a[5]={1,9,0,23,-45};float b[5]={2.4, 7.6, 5.5, 6.6, -2.3 };long c[5]={10100,-123567, 1198783,-165654, 3456}; sort(a);sort(b);sort(c);return 0;}第二章1#include <iostream>using namespace std;class Time{public:void set_time();void show_time();private: //成员改为公用的int hour;int minute;int sec;};void Time::set_time() //在main函数之前定义{cin>>hour;cin>>minute;cin>>sec;}void Time::show_time() //在main函数之前定义{cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1;t1.set_time();t1.show_time();return 0;}2：#include <iostream>using namespace std;class Time{public:void set_time(void){cin>>hour;cin>>minute;cin>>sec;void show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}private: int hour;int minute;int sec;};Time t;int main(){t.set_time();t.show_time();return 0;}3：#include <iostream>using namespace std;class Time{public:void set_time(void);void show_time(void);private:int hour;int minute;int sec;};void Time::set_time(void){cin>>hour;cin>>minute;cin>>sec;}void Time::show_time(void){cout<<hour<<":"<<minute<<":"<<sec<<endl;}Time t;int main(){ t.set_time();t.show_time();return 0;}//xt2-4-1.cpp(main.cpp)#include <iostream>using namespace std;#include "xt2-4.h"int main(){Student stud;stud.set_value();stud.display();return 0;}//xt2-4-2.cpp(即student.cpp)#include "xt2-4.h" //在此文件中进行函数的定义#include <iostream>using namespace std; //不要漏写此行void Student::display( ){ cout<<"num:"<<num<<endl;cout<<"name:"<<name<<endl;cout<<"sex:"<<sex<<endl;}void Student::set_value(){ cin>>num;cin>>name;cin>>sex;}5：//xt2-5-1.cpp(file1.cpp)#include <iostream>#include "xt2-5.h"int main(){Array_max arrmax;arrmax.set_value();arrmax.max_value();arrmax.show_value();return 0;}//xt2-5-2.cpp(arraymax.cpp)#include <iostream>using namespace std;#include "xt2-5.h"void Array_max::set_value()for (i=0;i<10;i++)cin>>array[i];}void Array_max::max_value(){int i;max=array[0];for (i=1;i<10;i++)if(array[i]>max) max=array[i];}void Array_max::show_value(){cout<<"max="<<max<<endl;}6：解法一#include <iostream>using namespace std;class Box{public:void get_value();float volume();void display();public:float lengh;float width;float height;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}{Box box1,box2,box3;box1.get_value();cout<<"volmue of bax1 is ";box1.display();box2.get_value();cout<<"volmue of bax2 is ";box2.display();box3.get_value();cout<<"volmue of bax3 is ";box3.display();return 0;}解法二：#include <iostream>using namespace std;class Box{public:void get_value();void volume();void display();public:float lengh;float width;float height;float vol;};void Box::get_value(){ cout<<"please input lengh, width,height:"; cin>>lengh;cin>>width;cin>>height;}void Box::volume(){ vol=lengh*width*height;}void Box::display(){ cout<<vol<<endl;}int main(){Box box1,box2,box3;box1.get_value();box1.volume();cout<<"volmue of bax1 is ";box1.display();box2.get_value();box2.volume();cout<<"volmue of bax2 is ";box2.display();box3.get_value();box3.volume();cout<<"volmue of bax3 is ";box3.display();return 0;}第三章2:#include <iostream>using namespace std;class Date{public:Date(int,int,int);Date(int,int);Date(int);Date();void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }Date::Date(int m,int d):month(m),day(d){year=2005;}Date::Date(int m):month(m){day=1;year=2005;}{month=1;day=1;year=2005;}void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d3(10);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}3:#include <iostream>using namespace std;class Date{public:Date(int=1,int=1,int=2005);void display();private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y) { }void Date::display(){cout<<month<<"/"<<day<<"/"<<year<<endl;}int main(){Date d1(10,13,2005);Date d2(12,30);Date d4;d1.display();d2.display();d3.display();d4.display();return 0;}4:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void display();private:int num;float score;};void Student::display(){cout<<num<<" "<<score<<endl;}int main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};Student *p=stud;for(int i=0;i<=2;p=p+2,i++)p->display();return 0;}5:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}int num;float score;};void main(){Student stud[5]={Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)};void max(Student* );Student *p=&stud[0];max(p);}void max(Student *arr){float max_score=arr[0].score;int k=0;for(int i=1;i<5;i++)if(arr[i].score>max_score) {max_score=arr[i].score;k=i;}cout<<arr[k].num<<" "<<max_score<<endl;}6:#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display(){cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}7: 解法一#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;}//可改为:void display() const {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){const Student stud(101,78.5);stud.display();//stud.change(101,80.5);stud.display();return 0;}解法二：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) const {num=n;score=s;}void display() const {cout<<num<<" "<<score<<endl;} private:mutable int num;mutable float score;};int main(){const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;}解法三：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);Student *p=&stud;p->display();p->change(101,80.5);p->display();return 0;}8：#include <iostream>using namespace std;class Student{public:Student(int n,float s):num(n),score(s){}void change(int n,float s) {num=n;score=s;}void display() {cout<<num<<" "<<score<<endl;} private:int num;float score;};int main(){Student stud(101,78.5);void fun(Student&);fun(stud);return 0;}void fun(Student &stu){stu.display();stu.change(101,80.5);stu.display();}9：#include <iostream>using namespace std;class Product{public:Product(int n,int q,float p):num(n),quantity(q),price(p){};void total();static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;};void Product::total(){float rate=1.0;if(quantity>10) rate=0.98*rate;sum=sum+quantity*price*rate*(1-discount);n=n+quantity;}void Product::display(){cout<<sum<<endl;cout<<average()<<endl;}float Product::average(){return(sum/n);}float Product::discount=0.05;float Product::sum=0;int Product::n=0;int main(){Product Prod[3]={Product(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) };for(int i=0;i<3;i++)Prod[i].total();Product::display();return 0;}10：#include <iostream>using namespace std;class Date;class Time{public:Time(int,int,int);friend void display(const Date &,const Time &); private:int hour;int minute;int sec;};Time::Time(int h,int m,int s){hour=h;minute=m;sec=s;}class Date{public:Date(int,int,int);friend void display(const Date &,const Time &); private:int month;int day;int year;};Date::Date(int m,int d,int y){month=m;day=d;year=y;}void display(const Date &d,const Time &t){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl; }int main(){Time t1(10,13,56);Date d1(12,25,2004);display(d1,t1);return 0;}11：#include <iostream>using namespace std;class Time;class Date{public:Date(int,int,int);friend Time;private:int month;int day;int year;};Date::Date(int m,int d,int y):month(m),day(d),year(y){ }class Time{public:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;};Time::Time(int h,int m,int s):hour(h),minute(m),sec(s){ }void Time::display(const Date &d){cout<<d.month<<"/"<<d.day<<"/"<<d.year<<endl; cout<<hour<<":"<<minute<<":"<<sec<<endl;}int main(){Time t1(10,13,56);Date d1(12,25,2004);t1.display(d1);return 0;}12：#include <iostream>using namespace std;template<class numtype>class Compare{public:Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;};template <class numtype>Compare<numtype>::Compare(numtype a,numtype b){x=a;y=b;}template <class numtype>numtype Compare<numtype>::max(){return (x>y)?x:y;}template <class numtype>numtype Compare<numtype>::min(){return (x<y)?x:y;}int main(){Compare<int> cmp1(3,7);cout<<cmp1.max()<<" is the Maximum of two integer numbers."<<endl;cout<<cmp1.min()<<" is the Minimum of two integer numbers."<<endl<<endl; Compare<float> cmp2(45.78,93.6);cout<<cmp2.max()<<" is the Maximum of two float numbers."<<endl;cout<<cmp2.min()<<" is the Minimum of two float numbers."<<endl<<endl; Compare<char> cmp3('a','A');cout<<cmp3.max()<<" is the Maximum of two characters."<<endl;cout<<cmp3.min()<<" is the Minimum of two characters."<<endl;return 0;}第四章1:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}double get_real();double get_imag();void display();private:double real;double imag;};double Complex::get_real(){return real;}double Complex::get_imag(){return imag;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator + (Complex &c1,Complex &c2){return Complex(c1.get_real()+c2.get_real(),c1.get_imag()+c2.get_imag()); }int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c3=";c3.display();return 0;}2:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator-(Complex &c2);Complex operator*(Complex &c2);Complex operator/(Complex &c2);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c2){Complex c;c.real=real+c2.real;c.imag=imag+c2.imag;return c;}Complex Complex::operator-(Complex &c2){Complex c;c.real=real-c2.real;c.imag=imag-c2.imag;return c;}Complex Complex::operator*(Complex &c2){Complex c;c.real=real*c2.real-imag*c2.imag;c.imag=imag*c2.real+real*c2.imag;return c;}Complex Complex::operator/(Complex &c2){Complex c;c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag); return c;}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}int main(){Complex c1(3,4),c2(5,-10),c3;c3=c1+c2;cout<<"c1+c2=";c3.display();cout<<"c1-c2=";c3.display();c3=c1*c2;cout<<"c1*c2=";c3.display();c3=c1/c2;cout<<"c1/c2=";c3.display();return 0;}3:#include <iostream> //用VC++时改为∶#include <iostream.h> using namespace std; //用VC++时为取消此行class Complex{public:Complex(){real=0;imag=0;}Complex(double r,double i){real=r;imag=i;}Complex operator+(Complex &c2);Complex operator+(int &i);friend Complex operator+(int&,Complex &);void display();private:double real;double imag;};Complex Complex::operator+(Complex &c){return Complex(real+c.real,imag+c.imag);}Complex Complex::operator+(int &i){return Complex(real+i,imag);}void Complex::display(){cout<<"("<<real<<","<<imag<<"i)"<<endl;}Complex operator+(int &i,Complex &c){return Complex(i+c.real,c.imag);}int main(){Complex c1(3,4),c2(5,-10),c3;int i=5;c3=c1+c2;cout<<"c1+c2=";c3=i+c1;cout<<"i+c1=";c3.display();c3=c1+i;cout<<"c1+i=";c3.display();return 0;}4:#include <iostream>using namespace std;class Matrix //定义Matrix类{public:Matrix(); //默认构造函数friend Matrix operator+(Matrix &,Matrix &); //重载运算符“+”void input(); //输入数据函数void display(); //输出数据函数private:int mat[2][3];};Matrix::Matrix() //定义构造函数{for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b) //定义重载运算符“+”函数{Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}void Matrix::input() //定义输入数据函数{cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)cin>>mat[i][j];}void Matrix::display() //定义输出数据函数{for (int i=0;i<2;i++){for(int j=0;j<3;j++){cout<<mat[i][j]<<" ";}cout<<endl;}}int main(){Matrix a,b,c;a.input();b.input();cout<<endl<<"Matrix a:"<<endl;a.display();cout<<endl<<"Matrix b:"<<endl;b.display();c=a+b; //用重载运算符“+”实现两个矩阵相加cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl;c.display();return 0;}5:#include <iostream.h>//using namespace std;class Matrix{public:Matrix();friend Matrix operator+(Matrix &,Matrix &);friend ostream& operator<<(ostream&,Matrix&);friend istream& operator>>(istream&,Matrix&);private:int mat[2][3];};Matrix::Matrix(){for(int i=0;i<2;i++)for(int j=0;j<3;j++)mat[i][j]=0;}Matrix operator+(Matrix &a,Matrix &b){Matrix c;for(int i=0;i<2;i++)for(int j=0;j<3;j++){c.mat[i][j]=a.mat[i][j]+b.mat[i][j];}return c;}istream& operator>>(istream &in,Matrix &m){cout<<"input value of matrix:"<<endl;for(int i=0;i<2;i++)for(int j=0;j<3;j++)in>>m.mat[i][j];return in;}ostream& operator<<(ostream &out,Matrix &m){for (int i=0;i<2;i++){for(int j=0;j<3;j++){out<<m.mat[i][j]<<" ";}out<<endl;}return out;}int main(){ Matrix a,b,c;cin>>a;cin>>b;cout<<endl<<"Matrix a:"<<endl<<a<<endl;cout<<endl<<"Matrix b:"<<endl<<b<<endl;c=a+b;cout<<endl<<"Matrix c = Matrix a + Matrix b :"<<endl<<c<<endl; return 0;}6:#include <iostream>using namespace std;class Complex{public:Complex(){real=0;imag=0;}Complex(double r){real=r;imag=0;}Complex(double r,double i){real=r;imag=i;}operator double(){return real;}void display();private:double real;double imag;};void Complex::display(){cout<<"("<<real<<", "<<imag<<")"<<endl;}int main(){Complex c1(3,4),c2;double d1;d1=2.5+c1;cout<<"d1="<<d1<<endl;c2=Complex(d1);cout<<"c2=";c2.display();return 0;}7:#include <iostream>using namespace std;class Student{public:Student(int,char[],char,float);int get_num(){return num;}char * get_name(){return name;}char get_sex(){return sex;}void display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<score<<"\n\n";} private:int num;char name[20];char sex;float score;};Student::Student(int n,char nam[],char s,float so){num=n;strcpy(name,nam);sex=s;score=so;}class Teacher{public:Teacher(){}Teacher(Student&);Teacher(int n,char nam[],char sex,float pay);void display();private:int num;char name[20];char sex;float pay;};Teacher::Teacher(int n,char nam[],char s,float p){num=n;strcpy(name,nam);sex=s;pay=p;}Teacher::Teacher(Student& stud){num=stud.get_num();strcpy(name,stud.get_name());sex=stud.get_sex();pay=1500;}void Teacher::display(){cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\npay:"<<pay<<"\n\n";}int main(){Teacher teacher1(10001,"Li",'f',1234.5),teacher2;Student student1(20010,"Wang",'m',89.5);cout<<"student1:"<<endl;student1.display();teacher2=Teacher(student1);cout<<"teacher2:"<<endl;teacher2.display();return 0;}第五章1:#include <iostream>using namespace std;class Student{public:void get_value(){cin>>num>>name>>sex;}。

《C面向对象程序设计答案解析》-第五章谭浩强-清华大学出版社.docx

《C面向对象程序设计答案解析》-第五章谭浩强-清华大学出版社.docx

1:#include <iostream>using namespace std;class Student{public:void get_value(){cin>>num>>name>>sex;}void display( ){cout<<"num: "<<num<<endl;cout<<"name: "<<name<<endl;cout<<"sex: "<<sex<<endl;} private :int num;char name[10];char sex;};class Student1: public Student {public:void get_value_1(){get_value();cin>>age>>addr;}void display_1(){cout<<"age: "<<age<<endl;// 引用派生类的私有成员，正确。

cout<<"address: "<<addr<<endl;}// 引用派生类的私有成员，正确。

private:int age;char addr[30];};int main(){Student1 stud1;stud1.get_value_1();stud1.display();stud1.display_1();return 0;}2:#include <iostream>using namespace std;class Student{public:void get_value(){cin>>num>>name>>sex;}void display( ){cout<<"num: "<<num<<endl;cout<<"name: "<<name<<endl;cout<<"sex: "<<sex<<endl;}private :int num;char name[10];char sex;};class Student1: private Student{public:void get_value_1(){get_value();cin>>age>>addr;}void display_1(){display();cout<<"age: "<<age<<endl;// 引用派生类的私有成员，正确。

C程序设计(第四版)(谭浩强)完整版 课后习题答案

C程序设计(第四版)(谭浩强)完整版 课后习题答案

C程序设计(第四版)(谭浩强)第一章课后习题答案#include<stdio.h>//预编译.代码均调试成功,若有失误大多不是代码问题.自已找找.int main(){printf("Welcome to \n");return 0; //与int main对应,为了程序可移植性,建议全用int main + return 0;.}#include<stdio.h>int main(){int a,b,sum;a=5;b=4;sum=a+b;printf("The sum is %d .\n",sum);return 0;}P008 1.3 调用函数比较两个数的大小.#include<stdio.h>int main(){int max(int x,int y); //被调用函数在主函数后面,用前先声明.int a,b,c;scanf("%d,%d",&a,&b); //输入时要按格式来,此处的逗号,用空格会发生错误.c=max(a,b); //a,b作为实参传入被调用函数中.printf("The max is %d .\n",c);return 0;}int max(int x,int y) //定义了两个形参.{int z; //z属于局部变量,可与主函数中相同名字.if (x>y)z=x;elsez=y;return(z); //z作为整个程序的出口值,赋给主函数中的c.}P015 0.6 三个数的大小.(数字0表示课后练习题)#include<stdio.h>int main(){int a,b,c,d; //d是用于存储最大值的.int max(int x , int y , int z); //测试可知,在VS2008中,可以不预先声明.printf("Please input 3 numbers :\n");scanf("%d %d %d",&a,&b,&c);d=max(a,b,c); //调用函数中有三个形参,这里需要传入三个实参,才可运算.printf("The max is :%d .\n",d); // d可以换成max(a,b,c).}int max(int x , int y , int z){int m;if (x>y && x>z) //求三者之大的一种方法.m=x;if (y>x && y>z)m=y;if (z>y && z>x)m=z;return (m); //返回值m给主函数中的d.}C程序设计(第四版)(谭浩强)第2章课后习题答案算法——程序的灵魂#include<stdio.h>int main(){int i,s=1; //在执行数值操作前一定要先有个初值.for(i=1;i<6;i++) //这里是到6.{s=s*i; //相乘}printf("The sum is %d .\n",s);return 0;}#include<stdio.h> //作出要求:换成1到11间奇数相乘.int main(){int i,s=1; //在执行数值操作前一定要先有个初值.for(i=1;i<12;i++) //这里是到,但题目要求的是取单数.也可以是i=i+2{if(i%2!=0) //i对取模,值为非为奇数;为则为偶数.s=s*i;elsecontinue; //跳过这个for循环的这一次,执行下一次.}printf("The sum is %d .\n",s);return 0;}P019 2.2 按要求输出80分以上的学生信息.暂时没法做.P019 2.3 判断2000-2500年中的闰年,并输出.年的概念是地球围绕太阳一周的时间（所谓公转周期）称为一年，这个周期是相当稳定的，很长时间也不会变动1秒，但是真正的一年是365.2423天（目前）。

C++面向对象程序设计课后答案(谭浩强)

C++面向对象程序设计课后答案(谭浩强)

C++面向对象程序设计课后答案(1-4章)第一章：面向对象程序设计概述[1_1]什么是面向对象程序设计？面向对象程序设计是一种新型的程序设计范型。

这种范型的主要特征是：程序=对象+消息。

面向对象程序的基本元素是对象，面向对象程序的主要结构特点是：第一：程序一般由类的定义和类的使用两部分组成，在主程序中定义各对象并规定它们之间传递消息的规律。

第二：程序中的一切操作都是通过向对象发送消息来实现的，对象接受到消息后，启动有关方法完成相应的操作。

面向对象程序设计方法模拟人类习惯的解题方法，代表了计算机程序设计新颖的思维方式。

这种方法的提出是软件开发方法的一场革命，是目前解决软件开发面临困难的最有希望、最有前途的方法之一。

[1_2]什么是类？什么是对象？对象与类的关系是什么？在面向对象程序设计中，对象是描述其属性的数据以及对这些数据施加的一组操作封装在一起构成的统一体。

对象可以认为是：数据+操作在面向对象程序设计中，类就是具有相同的数据和相同的操作的一组对象的集合，也就是说，类是对具有相同数据结构和相同操作的一类对象的描述。

类和对象之间的关系是抽象和具体的关系。

类是多个对象进行综合抽象的结果，一个对象是类的一个实例。

在面向对象程序设计中，总是先声明类，再由类生成对象。

类是建立对象的“摸板”，按照这个摸板所建立的一个个具体的对象，就是类的实际例子，通常称为实例。

[1_3]现实世界中的对象有哪些特征？请举例说明。

对象是现实世界中的一个实体，其具有以下一些特征：（1）每一个对象必须有一个名字以区别于其他对象。

（2）需要用属性来描述它的某些特性。

（3）有一组操作，每一个操作决定了对象的一种行为。

（4）对象的操作可以分为两类：一类是自身所承受的操作，一类是施加于其他对象的操作。

例如：雇员刘名是一个对象对象名：刘名对象的属性：年龄：36 生日：1966.10.1 工资：2000 部门：人事部对象的操作：吃饭开车[1_4]什么是消息？消息具有什么性质？在面向对象程序设计中，一个对象向另一个对象发出的请求被称为“消息”。

C++面向对象程序设计第六章课后习题答案(第2版—谭浩强)

C++面向对象程序设计第六章课后习题答案(第2版—谭浩强)

第六章课后习题答案(第二版谭浩强）1：//xt6—1/cpp#include <iostream> //如用VC++应改为∶＃include 〈iosttram。

h>using namespace std；//如用VC++应取消此行#include "cylinder.h"＃include ”point。

cpp”#include ”circle。

cpp”＃include "cylinder。

cpp”int main(）｛Cylinder cy1(3。

5,6。

4，5.2，10)；cout<<"\noriginal cylinder：\nx="<<cy1。

getX（）<〈”，y=”〈<cy1。

getY（）〈〈"，r=”〈〈cy1。

getRadius（）<<”, h=”<<cy1。

getHeight（)<<"\narea="<<cy1.area（)〈〈"，volume="<〈cy1.volume(）〈〈endl；cy1.setHeight(15);cy1。

setRadius（7.5)；cy1.setPoint(5,5);cout<〈"\nnew cylinder：\n"〈〈cy1；Point ＆pRef=cy1;cout〈〈"\npRef as a point："〈〈pRef;Circle ＆cRef=cy1;cout〈<"\ncRef as a Circle：”<〈cRef；return 0；}3：解法一＃include <iostream>using namespace std；class Point{public：Point(float a,float b）:x（a），y（b）{}～Point（）｛cout〈<"executing Point destructor”〈<endl；｝private：float x；float y;};class Circle:public Point{public:Circle(float a,float b,float r）：Point(a，b)，radius（r）{｝～Circle(）｛cout〈〈"executing Circle destructor"<〈endl；｝private：float radius;}；int main(）｛Point *p=new Circle（2。

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C++面向对象程序设计课后答案(1-4章)
第一章：面向对象程序设计概述
[1_1]什么是面向对象程序设计？
面向对象程序设计是一种新型的程序设计范型。

这种范型的主要特征是：
程序=对象+消息。

面向对象程序的基本元素是对象，面向对象程序的主要结构特点是：第一：程序一般由类的定义和类的使用两部分组成，在主程序中定义各对象并规定它们之间传递消息的规律。

第二：程序中的一切操作都是通过向对象发送消息来实现的，对象接受到消息后，启动有关方法完成相应的操作。

面向对象程序设计方法模拟人类习惯的解题方法，代表了计算机程序设计新颖的思维方式。

这种方法的提出是软件开发方法的一场革命，是目前解决软件开发面临困难的最有希望、最有前途的方法之一。

[1_2]什么是类？什么是对象？对象与类的关系是什么？
在面向对象程序设计中，对象是描述其属性的数据以及对这些数据施加的一组操作封装在一起构成的统一体。

对象可以认为是：数据+操作
在面向对象程序设计中，类就是具有相同的数据和相同的操作的一组对象的集合，也就是说，类是对具有相同数据结构和相同操作的一类对象的描述。

类和对象之间的关系是抽象和具体的关系。

类是多个对象进行综合抽象的结果，一个对象是类的一个实例。

在面向对象程序设计中，总是先声明类，再由类生成对象。

类是建立对象的“摸板”，按照这个摸板所建立的一个个具体的对象，就是类的实际例子，通常称为实例。

[1_3]现实世界中的对象有哪些特征？请举例说明。

对象是现实世界中的一个实体，其具有以下一些特征：
（1）每一个对象必须有一个名字以区别于其他对象。

（2）需要用属性来描述它的某些特性。

（3）有一组操作，每一个操作决定了对象的一种行为。

（4）对象的操作可以分为两类：一类是自身所承受的操作，一类是施加于其他对象的操作。

例如：雇员刘名是一个对象
对象名：刘名
对象的属性：
年龄：36 生日：1966.10.1 工资：2000 部门：人事部
对象的操作：吃饭开车
[1_4]什么是消息？消息具有什么性质？
在面向对象程序设计中，一个对象向另一个对象发出的请求被称为“消息”。

当对象接收到发向它的消息时，就调用有关的方法，执行相应的操作。

消息是一个对象要求另一个对象执行某个操作的规格的说明，通过消息传递才能完成对象之间的相互请求或相互协作。

消息具有以下3个性质：
（1）同一个对象可以接收不同形式的多个消息，做出不同的响应。

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