c++面向对象

#include<iostream>
#include<stdlib.h>

using namespace std;

struct Rectangle
{
    public:
        Rectangle(int a, int b) : length(a), width(b){}
        int area();
        int perimeter();
      
    private:
        int length, width;
};

int Rectangle::area()
{
    return(length * width);
}

int Rectangle::perimeter()
{
    return(length + width);
}

int main(void)
{
    struct Rectangle rect(10, 20);
    cout << "area is:" << rect.area() << endl;
    cout << "perimeter is:" << rect.perimeter() << endl;

    system("pause");
    return 0;
}
//只给你写个长方形的，其它自己想着做吧，这样的题目都不自己做的话，那还是不要学编程了