C++ 虚函数 笔试题目--绿盟科技

求下面程序的输出值：

class A{
public:
 A() {func(0);};
 virtual void func(int data) {printf("A1 :%d\n",data);}
 virtual void func(int data) const {printf("A2 :%d\n",data);}
 void func(char *str) {printf("A3 :(%s)\n",str);}
};

class B:public A{
public:
 void func() {printf("B1 :%s\n","");}
 void func(int data) {printf("B2 :%d\n",data);}
 void func(char *str) {printf("B3 :(%s)\n",str);}
};

int main()
{
 A *pA;
 B b;                        // A1:0                 
 const A *pcA;
 
 pA=&b;
  pA->func(1);    &nb