C++Day2

#include 
 
using namespace std;
 
class Rect
{
private:
    int width;
    int height;
public:
    void init(int width,int height);
    void set_w(int width);
    void set_h(int height);
    void show();
};
 
void Rect::init(int width,int height)
{
    this->width=width;
    this->height=height;
}
 
void Rect::set_w(int width)
{
    this->width=width;
}
 
void Rect::set_h(int height)
{
    this->height=height;
}
 
void Rect::show()
{
    cout << "width= " << width << endl;
    cout << "height= " << height << endl;
    cout << "C= " << (width+height)*2 << endl;
    cout << "S= " << width*height << endl;
}
 
int main()
{
    Rect r;
    r.init(20,10);
    r.show();
    cout << endl;
    r.set_w(40);
    r.set_h(30);
    r.show();
 
    return 0;
}