xt12-3-2.cpp

来自「谭浩强所著C++课后的部分习题集解答(c++)」· C++ 代码 · 共 27 行

#include <iostream>
using namespace std;
class Point
{public:
  Point(float a,float b):x(a),y(b){}
  ~Point(){cout<<"executing Point destructor"<<endl;}
 private:
  float x;
  float y;
};

class Circle:public Point
{public:
Circle(int a,int b,int r):Point(a,b),radius(r){}
  ~Circle(){cout<<"executing Circle destructor"<<endl;}
 private:
  float radus;
};

int main()
{Point *p=new Circle(2.5,1.8,4.5);
 Circle *pt=new Circle(2.5,1.8,4.5);
 delete pt;
 return 0;
}