#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
    int opt;
    while ((opt = getopt(argc, argv, "hf:o:")) != -1) {
        switch (opt) {
        case 'h': puts("Help"); break;
        case 'f': printf("File: %s\n", optarg); break;
        case 'o': printf("Output: %s\n", optarg); break;
        default: fprintf(stderr, "Usage: %s [-h] [-f file] [-o output]\n", argv[0]); return 1;
        }
    }
    return 0;
}