class A
{
public:
     virtual int function () {
        return 1;
     }
 
     int get() {
         return this->function();
     }
};
 
class B: public A
{
public:
     int function() {
        return 2;
     }
};
 
#include <iostream>
 
int main() {
   B b; 
 
   std::cout << b.get() << std::endl; 
 
   return 0;
}