X-Mind

#include <iostream>using namespace std;
class Rect
{
private:int width;int heigjt;
public:void init(int w,int h){width = w;heigjt = h;}void set_w(int w){width = w;}void set_h(int h){heigjt = h;}void show(){cout << "矩形的周长" << (width+heigjt)*2 << endl << "矩形的面积" << width*heigjt << endl;}
};
int main()
{Rect r;int w=5,h=6;r.init(w,h);r.show();r.set_w(10);r.set_h(20);cout << "更改后" << endl;r.show();return 0;
}