#ifndef MY_H_INCLUDED
#define MY_H_INCLUDED


extern int a  ;

extern const int b;


#endif // MY_H_INCLUDED

#include "my.h"

int a = 100 ;
extern const int b = 200 ;

#include <iostream>
#include "my.h"

int main()
{

    std::cout<<a<<std::endl;
    std::cout<<b<<std::endl;

    return 0;
}