2023.10.08

#include 
 
using namespace std;
 
class Rect
{
private:
    int width;
    int height;
public:
    void init(int width,int height);
    void set_w();
    void set_h();
    void show();
};
 
void Rect::init(int width,int height)
{
    this->width=width;
    this->height=height;
}
 
void Rect::set_w()
{
    cout << "需要更改的宽度：";
    cin >> width;
}
 
void Rect::set_h()
{
    cout << "需要更改的高度：";
    cin >> height;
}
 
void Rect::show()
{
    cout << "面积为：" << width*height << endl;
}
 
int main()
{
    Rect rec;
    rec.init(5,5);
    rec.show();
    rec.set_h();
    rec.show();
    rec.set_w();
    rec.show();
    return 0;
}