多态

最新推荐文章于 2025-08-10 20:48:00 发布

原创最新推荐文章于 2025-08-10 20:48:00 发布 · 448 阅读

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本文展示了C++中基类与派生类之间的继承关系及多态特性，通过代码实例阐述了如何实现多态，并理解其背后的机制。


#include<iostream>
using namespace std;
class ClxBase{
public:
    ClxBase() {};
    ~ClxBase() {cout << "Output from the destructor of class ClxBase!" << endl;};

    void DoSomething() { cout << "Do something in class ClxBase!" << endl; };
};

class ClxDerived : public ClxBase{
public:
    ClxDerived() {};
    ~ClxDerived() { cout << "Output from the destructor of class ClxDerived!" << endl; };

    void DoSomething() { cout << "Do something in class ClxDerived!" << endl; }
};
  int   main(){  
 <span style="color:#ff0000;"> ClxBase *p =  new ClxDerived;
  p->DoSomething();</span>
  delete p;
  return 0;
  } 

因为没有虚函数表，所以直接就执行base 类的函数。若有虚函数表，就实现了多态。
http://baike.baidu.com/view/161302.htm?fr=aladdin