个人技术分享

#include <iostream>

using namespace std;

class Rect
{
private:
    int width;
    int height;
public:
    void init(int w, int h)
    {
       width = w;
       height = h;
    }

    void set_w(int w)
    {
        width = w;
    }

    void set_h(int h)
    {
        height = h;
    }

    void show(){
        cout << "矩形周长=" << (width + height)*2 << endl;
        cout << "矩形面积=" << width * height << endl;
    }
};

int main()
{
    Rect r1;
    r1.init(10, 20);
    r1.show();
    r1.set_h(10);
    r1.set_w(5);
    r1.show();
    return 0;
}

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