6-3（2）

#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(float a,float b,float r):Point(a,b),radius(r){}
	~Circle(){cout<<"executing Circle destructor"<<endl;}
private:
	float radius;
};
int main()
{
 Point *p=new Circle(1,2,3);
 Circle *r=new Circle(1,2,3);
 delete r;
 return 0;
}