6-3（3）

原创于 2015-06-16 19:34:05 发布 · 228 阅读

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本文介绍如何在C++中使用面向对象编程实现Circle类继承自Point类，并展示了如何正确实现析构函数以确保资源的释放。

#include <iostream>
using namespace std;
class Point
{
 public:
	 Point(float a,float b):x(a),y(b){}
	 virtual ~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);
 delete p;
 return 0;
}