class A{
public:
  char ma;                       
  void f(){
    cout << "\n f w A \n"  ;  	
  }
};
 
class B : public A {
public:
  int mb; 
  void f(){
    cout << "\n f w B \n" ;
  }
};
 
void check( A * p){
  p->ma = 3;
  p->f();
}

 
 
 
 
_Z5checkP1A:
push	rbp
mov	rbp, rsp
 
mov	rax, rdi
mov	byte [rax], 3
 
call	_ZN1A1fEv
 
leave
ret