思维导图

代码

#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()
   {
       int zhou = (width + height) * 2;
       int mian = width * height;
       cout << "矩形宽为:" << width << " 矩形高为:" << height << endl;
       cout << "周长为:" << zhou << "  面积为:" << mian << endl;
   }
};
int main()
{
    Rect a1;

    a1.init(6,2);
    a1.show();
    a1.set_h(10);
    a1.set_w(6);
    a1.show();

    return 0;
}

结果