多继承中虚函数的定义与应用

#include<iostream>
using namespace std;
class Base1
{
public :
virtual void TestA()
{
cout<<"Base1 TestA()\n";
}
};
class Base2
{
public :
virtual void TestB()
{
cout<<"Base2 TestB\n";
}
};
class Derived:public Base1,public Base2
{
public :
void TestA()//重写基类Base1中的虚函数
{
cout<<"Derived TestA() rewritted\n";
}
void TestB()//重写基类Base2中的虚函数TestB()
{
cout<<"Derived TestB() rewritted\n";
}
};
int main()
{
Derived D;
Base1 *pb1=&D;
Base2 *pb2=&D;
pb1->TestA();
pb2->TestB();
return 0;
}