c++ - Is printing of a member pointer to an int defined -

suppose have code:

#include <iostream>  struct mine {     int a;     int b; };   int main() {      int mine::* memberpointera = &mine::a;     int mine::* memberpointerb = &mine::b;        std::cout << memberpointera;     std::cout << "\n";     std::cout << memberpointerb; } 

when run microsoft visual c++ (2015)

i following output

1 1 

the output expect more this:

1 2 

so begs question: printing of member pointer defined behavior?

there's defined conversion pointer bool. since member variable pointers not null, evaluate true , print 1.