Something

        char time[] = "1:27";
        char *s1 = time;
        char *savept = NULL;

        int hour = atoi(strtok_r(s1, ":", &savept));
        int min = atoi(strtok_r(s1, ":", &savept));

        int total = hour + min;

        printf("Hour is: %i\nMinute is: %i\nTotal is: %i\n", total );