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;
}