Question

1. 声明一个名为Rectangle的矩形类，其属性为矩形的左下角和右上角两点的坐标，并有成员函数计算矩形的周长

Answer 1

#include<iostream>
#include<math.h>
using namespace std;
class Rectangle
{
public:
Rectangle()
{
cout<<"请输入左下角的横坐标:";cin>>x1;
cout<<"请输入左下角的纵坐标:";cin>>y1;
cout<<"请输入右上角的横坐标:";cin>>x2;
cout<<"请输入右上角的纵坐标:";cin>>y2;
}
float GetArea()

{
return abs(x2-x1)*abs(y2-y1);
}
float length()
{
return 2*abs(x2-x1)+2*abs(y2-y1);
}
private:
float x1,x2,y1,y2;
};
void main()
{
Rectangle r;
cout<<"面积="<<r.GetArea()<<endl;
cout<<"周长="<<r.length()<<endl;
}

Answer 2

不会