#include <iostream>
#include "add.h"
#include "sub.h"
int main ( int argc, char **argv )
{
    std::cout << "Hello, world!" << std::endl;
    std::cout <<"2 + 3 = " << add ( 2,3 ) <<std::endl;
    std::cout <<"2 - 3 = " << sub ( 2,3 ) <<std::endl;
    return 0;
}