#include <iostream>

using namespace std;

// Function header (prototype)
int difference(int, int);

/*
    difference: Does a simple calculation.

    parameters:
    a - first number
    b - second number.

    Returns a-b
*/
int difference(int a, int b) {
    if(a>b)
        return a-b;
    else return b-a;
}

int main() {

    int answer;

    answer=difference(25,10);
    cout << answer << endl;

    answer=difference(5,10);
    cout << answer << endl;

    return 0;
}