//main.cpp
#include <iostream>
#include "../head/io.h"

using namespace std;

int main()
{
    int first=readNumber();
    int second=readNumber();
    writeAnswer(first+second);
    return 0;
}

//io.cpp
#include <iostream>
using namespace std;

void writeAnswer(int result)
{
  cout << "Result: " << result << endl;
}

int readNumber()
{
  int number;
  cout << "Enter a number: ";
  cin >> number;
  return number;
}

//io.h
#ifndef IO_H
#define IO_H

void writeAnswer(int);
int readNumber();

#endif