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#include 

using namespace std;
class Rect
{
private:
    int width;
    int height;
public:
    Rect(int w,int h):width(w),height(h)
    {}
    void set_w(int w)
    {
        this->width=w;
    }
    void set_h(int h)
    {
        Rect::height=h;
    }
    void show()
    {
        cout << "长X宽= " << width*height << endl;
    }

};
int main()
{
    Rect s1(2,4);
    int h,w;
    cout <<"请输入宽";
    cin >>w;
    cout <<"请输入高";
    cin >>h;
    s1.set_h(h);
    s1.set_w(w);
    s1.show();
    return 0;
}