#include <iostream>using namespace std;class Rect
{
private:int width;int height;
public:void init(int w,int h){width = w;height = h;}void set_w(int w){width = w;}void set_h(int h){height = h;}void show(){cout << "矩形的周长为：" << (width + height) * 2 << endl;cout << "矩形的面积为：" << width * height << endl;}
};
int main()
{Rect r1;r1.init(15,20);r1.show();r1.set_h(5);r1.set_w(8);r1.show();return 0;
}