virtual析构函数

一、文章来由

二、直接上代码来的清楚

[code]#include <iostream>
using namespace std;

class Father
{
public:
    Father() {
        cout<<"父类诞生了"<<endl;
    }

    ~Father() {
        cout<<"父类挂了"<<endl;
    }

protected:
private:
};

class Kid : public Father
{
public:
    Kid() {
        cout<<"子类诞生了"<<endl;
    }

    ~Kid() {
        cout<<"子类挂了"<<endl;
    }

protected:
private:
};

int main() 
{
    Father *f = new Kid();
    delete f; //只delete父类，子类不会被析构

    cout<<endl;

    Father *f1 = new Kid();
    delete (Kid *)f1;

    return 0; 
}

[code]    virtual ~Father() {
        cout<<"父类挂了"<<endl;
    }