错误多态使用

#include<iostream>

usingnamespacestd;

classA

{

public:

A(){cout<<"A::"<<endl;}

virtualvoidfunc1(){cout<<"A::func1"<<endl;}

};

classB:publicA

{

public:

voidfunc1(){cout<<"B::func1"<<endl;}

};

voidfunc(A pA)//这不是多态的使用,这个只会隐式类型转换

{

pA.func1();

}

intmain()

{

cout<<"Hello World!"<<endl;

Bb;

Aa;

func(b);

return0;

}