CodinGame_2023_08_22__15_38_19__minutes.c

#include <string.h>
#include <stdbool.h>

/**
    Entrée
    8:12
    14:32

    Sortie attendue
    380

 **/

long chars_to_int(const char *s);

int main()
{
    char depart[6];
    scanf("%[^\n]", depart); fgetc(stdin);
    char arrive[6];
    scanf("%[^\n]", arrive);

    // Write an answer using printf(). DON'T FORGET THE TRAILING \n
    // To debug: fprintf(stderr, "Debug messages...\n");
    char *ptr = strtok(arrive, ":");
    long hourArr = chars_to_int(ptr);
    ptr = strtok(NULL, ":");
    long minArr = chars_to_int(ptr);

    ptr = strtok(depart, ":");
    long hourDep = chars_to_int(ptr);
    ptr = strtok(NULL, ":");
    long minDep = chars_to_int(ptr);

    long sum = ((hourArr-hourDep) * 60) + (minArr - minDep);
    printf("%ld", sum);

    return 0;
}

long chars_to_int(const char *s) {
    char *endptr;
    long num = strtol(s, &endptr, 10);
    if (*endptr == '\0') {
        return num;
    } else {
        exit(-1);
    }
}