c++实验程序

1.#include <iostream>#include<cmath>using namespace std;void main(){float a,b,c;cout<<"Enter the coefficients of a quadratic equation:"<<endl;cout<<"\ta:";cin>>a;cout<<"\tb:";cin>>b;cout<<"\tc:";cin>>c;cout<<"The equation is :"<<a<<"*x*x+"<<b<<"*x+"<<c<<"=0"<<endl;float d=b*b-4*a*c;float x1=(-b+sqrt(d))/(2*a);float x2=(-b-sqrt(d))/(2*a);cout <<"The solutions are :"<<endl;cout<<"\tx1="<<x1<<endl;cout<<"\tx2="<<x2<<endl;cout<<"Check:"<<endl;cout<<"\ta*x1*x1+b*x1+c="<<a*x1*x1+b*x1+c<<endl;cout<<"\ta*x2*x2+b*x2+c="<<a*x2*x2+b*x2+c<<endl;}#include <iostream>using namespace std;#define Player1 0;#define Player2 1;#define Tie 2;void main(){int choice1,choice2,winner;cout<<"Choose rock(0),cloth(1),or scissors(2):"<<endl;cout<<"Player #1:";cin>>choice1;cout<<"Player #2:";cin>>choice2;switch(choice2-choice1){case 0:winner=Tie;cout<<"\tYou tied."<<endl;break;case -1:case 2:winner=Player1;cout<<"\tPlayer #1 wins."<<endl;break;case -2:case 1:winner=Player2;cout<<"\tPlayer #2 wins."<<endl;}}2.#include<iostream>using namespace std;int Take(long,int);void main(){int n,k;cout<<"Enter a integer:";cin>>n;do {cout<<"location:";cin>>k;cout<<"Digit number "<<k<<"of"<<n<<"is"<<Take(n,k)<<endl; }while(k>0);}int Take (long n,int k){for (int i=0;i<k;i++)n/=10;return n%10;}#include <iostream>using namespace std;double polynomial(double,double,double=0,double=0,double=0,double=0);void main(){double x;cout<<"Please ender x:";cin>>x;cout<<"polynomial(x,1)="<<polynomial(x,1)<<endl;cout<<"polynomial(x,1,2)="<<polynomial(x,1,2)<<endl;cout<<"polynomial(x,1,2,3)="<<polynomial(x,1,2,3)<<endl;cout<<"polynomial(x,1,2,3,4)="<<polynomial(x,1,2,3,4)<<endl;cout<<"polynomial(x,1,2,3,4,5)="<<polynomial(x,1,2,3,4,5)<<endl; }double polynomial(double x,double a0,double a1,double a2,double a3,double a4){return a0+(a1+(a2+(a3+a4*x)*x)*x)*x;}3.11111111111111111111111111111111111111111#include <iostream>using namespace std;const int SIZE=3;typedef int Matrix [SIZE][SIZE];void print(Matrix);void rotate(Matrix);void main(){Matrix m={{1,2,3},{4,5,6},{7,8,9}};cout<<"Before matrix is rotated:"<<endl;print(m);cout<<"After matrix is rotated:"<<endl;rotate(m);print(m);}void print(Matrix A){int i,j;for(i=0;i<SIZE;i++){for(j=0;j<SIZE;j++)cout<<A[i][j]<<"\t";cout<<endl;}}void rotate(Matrix A){int i,j;Matrix temp;for(i=0;i<SIZE;i++){for(j=0;j<SIZE;j++)temp[i][j]=A[SIZE-j-1][i];}for(i=0;i<SIZE;i++){for(j=0;j<SIZE;j++)A[i][j]=temp[i][j];}}2222222222222222222222222222222222222222222 1111111#include<iostream>using namespace std;void invert(int A[],int n){int i,j,temp;int m=(n-1)/2;for (i=0;i<=m;i++){j=n-1-i;temp=A[i];A[i]=A[j];A[j]=temp;}}void main(){int i;int a[10]={0,1,2,3,4,5,6,7,8,9};for(i=0;i<10;i++)cout<<a[i]<<"\t";invert(a,10);printf("The array has been reverted:\n");for(i=0;i<10;i++)cout<<a[i]<<"\t";cout<<endl;}2222222#include<iostream>using namespace std;void invert(int *A,int n){int *i,*j,temp,*p;int m=(n-1)/2;i=A;j=A+n-1;p=A+m;for (;i<p;i++,j--){temp=*i;*i=*j;*j=temp;}}void main(){int i;int a[10]={0,1,2,3,4,5,6,7,8,9};for(i=0;i<10;i++)cout<<a[i]<<"\t";invert(a,10);printf("The array has been reverted:\n");for(i=0;i<10;i++)cout<<a[i]<<"\t";cout<<endl;}44444#include<iostream>using namespace std;void invert(int *A,int n){int *i,*j,temp,*p;int m=(n-1)/2;i=A;j=A+n-1;p=A+m;for (;i<p;i++,j--){temp=*i;*i=*j;*j=temp;}}void main(){int i,*p;int a[10]={0,1,2,3,4,5,6,7,8,9};for(i=0;i<10;i++)cout<<a[i]<<"\t";p=a;invert(a,10);printf("The array has been reverted:\n");for(p=a;p<a+10;p++)cout<<*p<<"\t";cout<<endl;}555555555555555555#include<iostream>using namespace std;enum Choice{rock,cloth,scissors};enum Winner{Player1,Player2,Tie};void main(){int n;Choice choice1,choice2;Winner winner;cout<<"Choose rock(0),cloth(1),or scissors(2):"<<endl;cout<<"Player #1:";cin>>n;choice1=Choice(n);cout<<"Player #2:";cin>>n;choice2=Choice(n);switch(choice2-choice1){case 0:winner=Tie;break;case -1:case 2:winner=Player1;break;case -2:case 1:winner=Player2;}if(winner==Tie)cout<<"\tYou tied."<<endl;else if(winner==Player1)cout<<"\tPlayer #1 wins."<<endl;elsecout<<"\tPlayer #2 wins."<<endl;}3#include<iostream.h>#include<string>class date{private:int year,month,day;public:date(){cout<<"birthday:";cin>>year>>month>>day;}void display(){cout<<year<<"-"<<month<<"-"<<day;}};class person{protected:char*name;public:person();};person::person(){char namestr[50];cout<<"name:";cin>>namestr;name=new char[strlen(namestr)+1];strcpy(name,namestr);}class student:public person{private:int ID,score;date birthday;public:student(){cout<<"student ID:";cin>>ID;cout<<"student score:";cin>>score;}void display(){cout<<"the basic information:"<<endl;cout<<ID<<"\t"<<name<<"\t"<<score<<"\t";birthday.display();cout<<endl;}};class professor:public person{private:int NO;char major[10];date birthday;public:professor(){cout<<"teacher ID:";cin>>NO;cout<<"schoolteaching major:";cin>>major;}void display(){cout<<"the basic information:";cout<<"\t"<<NO<<"\t"<<name<<"\t"<<major<<"\t";birthday.display();cout<<endl;}};void main(){student stu;stu.display();professor prof;prof.display();}4.#include <iostream>using namespace std;class plane{private:double aerofoil;double airframe;double empennage;double voyage;int passenger;public:plane(double,double,double,double,int);virtual void display();};void plane::display(){cout<<"\t"<<aerofoil<<"\t"<<airframe<<"\t"<<empennage<<"\t"<<voyage<<"\t"<<passenger;}plane::plane(double wing,double frame,double tail,double distance,int num) {aerofoil=wing;airframe=frame;empennage=tail;voyage=distance;passenger=num;}class fighter:public plane{private:int missile;public:fighter(double,double,double,double,int,int);void fight();void display();};fighter::fighter(double wing,double frame,double tail, double distance,int num,int load_missile):plane(wing,frame,tail,distance,num){missile=load_missile;}void fighter::fight(){cout<<"Fight!"<<endl;}void fighter::display(){cout<<"This is a fighter!"<<endl;plane::display();cout<<"\t"<<missile<<endl;}class bomber:public plane{private:double bomb;public:bomber(double,double,double,double,int,double);void atack();double getbomb();void display();};bomber::bomber(double wing,double frame,double tail,double distance,int num,double load_bomb):plane(wing,frame,tail,distance,num)bomb=load_bomb;}void bomber::atack(){cout<<"Atack!"<<endl;}double bomber::getbomb(){return bomb;}void bomber::display(){cout<<"This is a bomber!"<<endl;plane::display();cout<<"\t"<<bomb<<endl;}class fighter_bomber:virtual public fighter,virtual public bomber{public:fighter_bomber(double, double,double,double,int,int,double);void display();};void fighter_bomber::display(){cout<<"This is a fighter_bomber!"<<endl;fighter::display();cout<<"\t"<<getbomb()<<endl;fight();atack();}fighter_bomber::fighter_bomber(double wing,double frame,double tail, double distance,int num,int load_missile,double load_bomb):fighter(wing,frame,tail,distance,num,load_missile),bomber(wing,frame,tail,distance,num,load_bomb){ }void main(){fighter f(10.0,6.0,2.5,1800,1,8);f.display();bomber b(30,9,6,12000,12,6000);b.display();fighter_bomber fb(20,7,3.2,4000,2,6,2500);fb.display();5#include<iostream>using namespace std;template<class T>class Queue{public:Queue(int s=100):size(s+1),front(0),rear(0){data=new T[size];}~Queue(){delete []data;}void insert(const T&x){data[rear++%size]=x;}T remove(){return data[front++%size];}int is_empty()const{return front==rear;}int is_full()const{return((rear+1)%size==front);}private:int front,rear,size;T *data;};void main(){Queue<char>q(3);q.insert('A');q.insert('B');q.insert('C');if(q.is_full())cout<<"Queue is full."<<endl;elsecout<<"Queue is not full."<<endl;cout<<q.remove()<<endl;cout<<q.remove()<<endl;q.insert('D');q.insert('E');if(q.is_empty())cout<<"Queue is empty."<<endl;elsecout<<"Queue is not empty."<<endl;cout<<q.remove()<<endl;cout<<q.remove()<<endl;cout<<q.remove()<<endl;if(q.is_empty())cout<<"Queue is empty."<<endl;elsecout<<"Queue is not empty."<<endl;Queue<double>p(3);p.insert(1.11);p.insert(2.22);p.insert(3.33);cout<<p.remove()<<endl;cout<<p.remove()<<endl;p.insert(4.44);cout<<p.remove()<<endl;}。