#include <iostream>
 
using namespace std;
 
class Rect
{
private:
    int width;
    int height;
public:
    void init(int w,int h)
    {
        width=w;
        height=h;
    }
    int set_w(int w)
    {
        cin >> w;
        return  w;
    }
    int set_h(int h)
    {
        cin >> h;
        return  h;
    }
    void show()
    {
        cout << "面积" << width * height <<"平方厘米" << endl;
    }
};
 
int main()
{
   int width,heigh;
   cout << "请输入长度和高度(CM)" <<  endl;
   cin >> width;
   cin >> heigh;
   Rect sin;
   sin.init(width,heigh);
   sin.show();
   cout << "请输入要修改的长度(CM)" <<  endl;
   cin >> width;
   cout << "请输入要修改的高度(CM)" <<  endl;
   cin >> heigh;
   sin.init(width,heigh);
   sin.show();
    return 0;
}