#include <stdio.h>
#include <stdlib.h>

int main()
{
    unsigned int astd, amin;

    printf ("Gib Anfangszeit (hh:mm) ein: ");
    scanf("%2u:%2u", &astd, &amin);

    unsigned int estd, emin;

    printf ("Gib Endzeit (hh:mm) ein: ");
    scanf("%2u:%2u", &estd, &emin);

/*Berechnung der Zeit in Minuten*/
    unsigned int std;
    if (estd>astd)
        std=estd-astd;
    else if (estd<astd)
        std=24-astd+estd;
    else if (emin>=amin)
        std=estd-astd;
    else std=24-astd+estd;
    unsigned int min;
    if (emin>=amin)
        min=emin-amin;
    else
        min=amin-emin;
    unsigned int time=std*60+min;
    printf("Arbeitszeit in Minuten: %u\n", time);
    scanf("%u", &time);

/*Berechnung der Pause*/
    unsigned int pause;
    if (time>540)
        pause=45;
    else if (time>360)
        pause=30;
    else
        pause=0;
    printf("Pausenzeit in Minuten: %u\n", pause);
    scanf("%u", &pause);

/*Berechnung der Arbeitszeit*/
    unsigned int worktime=time-pause;
    printf("Arbeitszeit in Minuten: %u\n", worktime);
    scanf("%u", &worktime);

/*Berechnung der Arbeitseinheiten*/
    float unit=worktime/10.0;
    unsigned int unit1=unit;
    float unit2=unit-unit1;

    if (unit2!=0)
        unit1=unit1+1;
    else
        unit1=unit1;
    printf("Arbeitseinheiten: %u\n", unit1);
    scanf("%u", &unit1);

    return 0;
}