/*
 *  Dato: 17-09-2011
 *  Kursus: Imperativ Programming
 *  Underviser: Kurt Nørmark
 *  Opgave: http://people.cs.aau.dk/~normark/impr-c/control-conditional-exp-slide-exercise-1.html
 */

#include <stdio.h>

#define SEC_PER_HOUR 3600
#define SEC_PER_MIN 60

int main()
{
    // Initialiser variabler
    int total_seconds, rest, hours, minutes, seconds;

    // Få antal sekunder
    printf("Skriv et positivt antal sekunder: ");
    scanf("%d", &total_seconds);

    // Lav udregningerne.
    hours = total_seconds / SEC_PER_HOUR;
    rest = total_seconds % SEC_PER_HOUR;
    minutes = rest / SEC_PER_MIN;
    seconds = rest % SEC_PER_MIN;

    // Start på if statements

    if(total_seconds <= 0)
    {
        printf("Ikke godkendt.");
        return 0;
    }

    if(hours > 0)
    {
        if(hours == 1)
        {
            printf("%d time", hours);
        }
        else
        {
            printf("%d timer", hours);
        }
        if(minutes > 0 || seconds > 0)
        {
            if(minutes > 0 && seconds > 0)
            {
                printf(", ");
            }
            else
            {
                printf(" og ");
            }
        }
    }

    if(minutes > 0)
    {
        if(minutes == 1)
        {
            printf("%d minut", minutes);
        }
        else
        {
            printf("%d minutter", minutes);
        }
        if(seconds > 0)
        {
            printf(" og ");
        }
    }

    if(seconds > 0)
    {
        if(seconds == 1)
        {
            printf("%d sekund", seconds);
        }
        else
        {
            printf("%d sekunder", seconds);
        }
    }

    // Afslut.
    return 0;
}