北邮计算机院c++小学期.docx

#include<iostream>
#include<>
using namespace std;
main()
{

int m;
srand(time(NULL));//产生随机数种子
m=rand()%1000+1;
cout<<"********************猜数字游戏****************************"<<endl;
cout<<"请输入你猜想的合理的商品价格;";
int n;
cin>>n;
while(n>1000||n<1)//数据合法性判断
{
cout<<"你输入的数据不合理,请重新输入"<<endl;
cin>>n;
}
while(m!=n)
{
if(m>n)
cout<<"你输入的数过小,请重新输入!o(>﹏<)o"<<endl;
if(m<n)
cout<<"你输入的数过大,请重新输入!o(>﹏<)o"<<endl;
cin>>n;
}
cout<<"你好聪明呀,终于猜对啦↖(^ω^)↗"<<endl;
system("pause");
return 0;
}

#include<iostream>
#include<>
using namespace std;
class Point//点类
{
public:
Point(float X,float Y)
{
x=X;
y=Y;
}
float getX(){return x;}
float getY(){return y;}
float distance(Point A,Point B)
{
return sqrt((()-())*(()-())+(()-())*(()-()));
}
Point()//构造函数
{
cout<<"Point析构函数被调用"<<endl;
}
~Point()//析构函数
{
cout<<"point析构函数被调用"<<endl;
}

private:
float x;
float y;
};
class square//矩形类
{
public:
void putA(Point a){A=a;}
void putB(Point b){B=b;}
float S(Point A,Point B);
square()//构造函数
{
cout<<"square调用了构造函数"<<endl;
}
~square()//析构函数
{
cout<<"square调用了析构函数"<<endl;
}
private:
Point A;
Point B;
};
float square::S(Point A,Point B)//计算矩形的面积
{
float L,W;
L=()-();// 长
W=()-();//宽
if(L<0||W<0)
return 0;
return (L*W);
}
int main()
{
float x1,y1,x2,y2;
square C;

cout<<"请输入第一个点的坐标:";
cin>>x1>>y1;

Point A(x1,y1);
cout<<"请输入第二个点的坐标:";
cin>>x2>>y2;

Point B(x2,y2);
float square;
cout<<"两点间的距离是:";
cout<<(A,B)<<endl;
square=(A,B);
if(square==0)
cout<<"你输入的两个点是无效的-_-|||"<<endl;
else
{
cout<<"矩形的面积是:";
cout<<square<<endl;
}
system("pause");
return 0;
}

#include<iostream>
using namespace std;
class Car;
class Boat
{
friend double sum(Boat a,Car b);//友元函数
private:
double weight