如何删除基类指针? | 如何删除基类指针

本文介绍了如何删除基类指针?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

这是我的完整代码.......

This is mine whole code.......

class Interface
{
public:
virtual void fun()=0;
};
class Derived:public Interface
{
public:
void fun()
{
printf("i am in derived class fun\n");
}
};

int main()
{
Interface *pInterface;
Derived obj_Derived;

pInterface=&obj_Derived;

pInterface->fun();


return 0;
}

我想删除

I want to delete the

pInterface pointer

，因此我可以调用

delete pInterface;

否则我应该在Interface类中使用虚拟析构函数.

or should i have to take virtual destructor in Interface class.

推荐答案

int main()
{
  Interface *pInterface;

  pInterface=new Derived();
  pInterface->fun();

  delete pInterface;
  return 0;
}

然后，虚拟析构函数将完成这项工作.

THEN the virtual destructor will do the job.

delete pInterface;

将不会执行此操作，因为编译器不知道该对象将要删除哪个对象.因此，在您的接口类中声明一个虚拟析构函数，一切都会好起来.

will not do the job, because the compiler has no idea about which object is going to be deleted by this. So declare a virtual destructor in your interface class and all will be fine.

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