gistfile1.txt

#include <stdio.h>

class A
{
public:
        virtual float getz()
        {
                return 0.0;
        }
};

class B : public A
{
public:
        virtual float getz()
        {
                return 1.0;
        }
};


int main(int argc,  char* argv[])
{
        B b;
        printf("%d\n", b.getz());
        printf("%p\n", &(b.getz));
        return 0;
}
======================
~% g++ tmp.cpp
tmp.cpp: 在函数‘int main(int, char**)’中:
tmp.cpp:26:25: 错误：ISO C++ 不允许通过取已绑定的成员函数的地址来构造成员函数指针。请改用‘&B::getz’