virtual base class

来源：互联网发布：php设计模式编辑：程序博客网时间：2024/05/18 11:11

#include <iostream>

using namespace std;

class base{
private:
public:

void show(){cout << "In base, show()\n";}

// virtual void show(){cout << "In base, show()\n";}

};

class father: virtual public base{
//class father: public base{
private:
public:
//virtual void show(){cout << "In father, show()\n";}
};

class mother: virtual public base{
//class mother: public base{
private:
public:
//virtual void show(){cout << "In mother, show()\n";}
};

class child: public father, public mother{
private:
public:
//virtual void show(){cout << "In child, show()\n";}
};

int main()
{
child ch;
ch.show();
return 0;

}

====================================================================================================================================

In base, show()

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <iostream>

using namespace std;

class base{
private:
public:
void show(){cout << "In base, show()\n";}
};

class father: virtual public base{
//class father: public base{
private:
public:
virtual void show(){cout << "In father, show()\n";}
};

class mother: virtual public base{
//class mother: public base{
private:
public:
virtual void show(){cout << "In mother, show()\n";}
};

class child: public father, public mother{
private:
public:
using base::show;
void show(int){
cout << "In child, show()\n";
}
};

int main()
{
child ch;
ch.show();
return 0;
}

====================================================================================================================================

In base, show()