一个关于多态的问题

2018华为daniuchang一面

#include <iostream>using namespace std;class A{public:virtual void func(int a = 0){cout << a << endl;}};class B : public A{public:virtual void func(int b = 1){cout << b << endl;}};void main(){A* a = new B();a->func();//// 0000000000000000000000cin.get();}