c++西安交大(类二)

西安交通大学实验报告课程_C++程序设计_实验名称_类和对象(二) 第页共页系别__ ___ 实验日期 2013 年11月 28 日专业班级__ _组别_____________ 实验报告日期 2013 年11月 28 日姓名 _学号_ 报告退发 ( 订正、重做 )同组人_________________________________ 教师审批签字对比分析：一.实验目的1.复习类的定义和使用。

2. 学习定义和使用构造函数，并能使用不同形参的构造函数的重载。

3. 学习定义和使用构析函数。

4.掌握指向对象的指针的使用。

二.实验内容（－）实验题目一：第7章第5题1.程序源代码#include <iostream>#include <cmath>using namespace std;class Point_3D{private:double *point;public:Point_3D(int i=1,int j=1,int k=1){point=new double[3];point[0]=i;point[1]=j;point[2]=k;};Point_3D(Point_3D &m){point=new double[3];point[0]=m.point[0];point[1]=m.point[1];point[2]=m.point[2];};void Set(int i,int j,int k);double Distance(Point_3D &y);void Show();~Point_3D(){cout<<"This is the destructor function\n";cout<<"Point ";Show();delete []point;};};void Point_3D::Set(int i,int j,int k){point=new double[3];point[0]=i;point[1]=j;point[2]=k;}void Point_3D::Show(){cout<<"("<<point[0]<<","<<point[1]<<","<<point[2]<<")"<<endl;}double Point_3D::Distance(Point_3D &y){return sqrt((point[0]-y.point[0])*(point[0]-y.point[0])+(point[1] -y.point[1])*(point[1]-y.point[1])+(point[2]-y.point[2])*(point[2]-y. point[2]));}void main(){Point_3D p1(1,2,3);Point_3D p2;p2.Set(2,2,2);cout<<"Point1";p1.Show();cout<<"Point2";p2.Show();Point_3D p3(p2);cout<<"Point3";p3.Show();cout<<"Distance between point1 and point2 is "<<p1.Distance(p2)<< endl;}2.实验结果（二）实验题目二：第7章第6题1.程序源代码#include <iostream>#include <ctime>#include <Windows.h>using namespace std;class E_Clock{private:int Hour,Minute,Second;public:E_Clock() { Hour=0;Minute=0;Second=0;};E_Clock(int h,int m,int s){ Hour=h;Minute=m;Second=s;};void Set(int h,int m,int s){ Hour=h;Minute=m;Second=s;};void ShowTime() {cout<<Hour<<":"<<Minute<<":"<<Second<<" ";};void Run30s();void Count_up(int);void Count_down(int);};void E_Clock::Run30s(){for(int i=0;i<30;i++){Second++;if(Second==60){Second=0;Minute++;if(Minute==60){Minute=0;Hour++;if(Hour==24) Hour=0;}}cout<<"\r";Sleep(1000);ShowTime();}}void E_Clock::Count_up(int k){Set(0,0,0);ShowTime();for(int i=0;i<k;i++){Second++;if(Second==60){Second=0;Minute++;if(Minute==60){Minute=0;Hour++;if(Hour==24) Hour=0;}}cout<<"\r";Sleep(1000);ShowTime();}};void E_Clock::Count_down(int k) {Set(k/3600,(k%3600)/60,k%60);ShowTime();for(int i=0;i<k;i++){Second--;if(Second<0){Second+=60;Minute--;if(Minute<0){Minute+=60;Hour--;}}cout<<"\r";Sleep(1000);ShowTime();if(Hour==0&&Minute==0&&Second==0) break;}}void main(){E_Clock c1;c1.ShowTime();cout<<endl;time_t t;time(&t);int h=(t/3600+8)%24;int m=(t%3600)/60;int s=t%60;E_Clock c2(h,m,s);cout<<"Now the current time is ";c2.ShowTime();cout<<endl;c1.Set(9,2,23);c1.ShowTime();cout<<endl;cout<<"Next the clock will run for 30s\n";c1.Run30s();cout<<endl;cout<<"Next the clock will count up for 23s\n";c1.Count_up(23);cout<<endl;cout<<"Next the clock will count down for 30s\n";c1.Count_down(30);cout<<endl;}2.实验结果（三）实验题目三：第7章第7题1.程序源代码#include <iostream>#include <cmath>using namespace std;class Rational{private:int nu,de;public:Rational(int n=1,int d=1){if(d!=0) {nu=n;de=d;if(de<0){de=-de;nu=-nu;}} else cout<<"The denominator can't be zero!!";};void Set(int n,int d){if(d!=0) {nu=n;de=d;if(de<0){de=-de;nu=-nu;}} else cout<<"The denominator can't be zero!!";};void Add(Rational &k);void Sub(Rational &k);void Mul(Rational &k);void Div(Rational &k);void Print(){cout<<nu<<"/"<<de;};double Gcd();void Fsd();};double Rational::Gcd(){int k=1;for(int i=2;i<=abs(nu)||i<=abs(de);i++){if(nu%i==0&&de%i==0) k=i;}return k;}void Rational::Fsd(){de/=Gcd();nu/=Gcd();}void Rational::Add(Rational &k){nu=nu*k.de+k.nu*de;de=de*k.de;Fsd();}void Rational::Sub(Rational &k){nu=nu*k.de-k.nu*de;de=de*k.de;Fsd();}void Rational::Div(Rational &k){if(k.nu==0)cout<<"The denominator can't be zero!!";else{nu=nu*k.de;de=de*k.nu;Fsd();if(de<0){de=-de;nu=-nu;}}}void Rational::Mul(Rational &k){nu=nu*k.nu;de=de*k.de;Fsd();}void main(){Rational r1(6,8);r1.Print();cout<<endl;cout<<"The greatest common divisor is " <<r1.Gcd()<<endl;r1.Fsd();r1.Print();cout<<endl;Rational r2;r2.Set(5,7);cout<<"(5/7)/(3/4)=";r2.Div(r1);r2.Print();cout<<endl;Rational r3(5,7);r3.Add(r1);cout<<"5/7+3/4=";r3.Print();cout<<endl;Rational r4(5,7);r4.Sub(r1);cout<<"5/7-3/4=";r4.Print();cout<<endl;Rational r5(5,7);r5.Mul(r1);cout<<"(5/7)*(3/4)=";r5.Print();cout<<endl;}2.实验结果（四）实验题目四：第7章第8题1.程序源代码#include <iostream>#include <cstring>using namespace std;class Citizen{private:char id[19],name[9],gender,*bp,*fa; int age;public:Citizen(){strcpy(name,"xxxxxxxx");age = 0;gender= 'x';strcpy(id,"xxxxxxxxxxxxxxxxxx");bp=NULL;fa=NULL;}Citizen(char *n,char s,int a,char *ID,char *BP,char *FA){strcpy(name,n);age=a;gender=s;strcpy(id,ID);int L=strlen(BP);bp=new char[L+1];strcpy(bp,BP);L=strlen(FA);fa=new char[L+1];strcpy(fa,FA);}~Citizen( ){ cout<<"Now destroying Citizen "<<name<<endl;delete []bp;delete []fa;}void Input(char *n,char s,int a,char *ID,char *BP,char *FA);void Output();};void Citizen::Input(char *n, char s, int a, char *ID, char *BP, char *FA) {strcpy(name,n);age=a;gender=s;strcpy(id,ID);if(bp!=NULL) delete []bp;int L=strlen(BP);bp=new char[L+1];strcpy(bp,BP);if(fa!=NULL) delete []fa;L=strlen(FA);fa=new char[L+1];strcpy(fa,FA);}void Citizen::Output(){cout<<"姓名："<<name<<endl;cout<<"性别："<<gender<<endl;cout<<"年龄："<<age<<endl;cout<<"身份证号："<<id<<endl;if(bp!=NULL) cout<<"籍贯："<<bp<<endl;if(fa!=NULL) cout<<"家庭住址："<<fa<<endl;}void main(){Citizen person1,person2;cout<<"person1:\n";person1.Output();person2.Input("张三",'m',19,"610103************","中国上海市华山北路35号","西安市咸宁西路24号");cout<<"person2:\n";person2.Output();Citizen person3("李四",'f',29,"610103************","西安市咸宁西路24号","中国上海市华山北路35号");cout<<"person3:\n";person3.Output();}2.实验结果（五）实验题目五：设计定义圆管类，成员函数至少应有构造函数、计算容积函数、计算总体积函数、计算重量函数、计算表面积函数、输出函数和析构函数，并编写主函数加以测试。