#include <getopt.h>
#include <stdio.h>
#include <string.h>

#define VERSION "0.0.1"

int main(int argc, char *argv[]) {
    int                  opt;
    int                  option_index = 0;
    static struct option long_opts[] = {
        {"help", no_argument, 0, 'h'},
        {"file", required_argument, 0, 'f'},
        {"output", required_argument, 0, 'o'},
        {"version", no_argument, 0, 'v'},
        {0, 0, 0, 0},
    };

    int  has_file = 0;
    char a[128];

    while ((opt = getopt_long(argc, argv, "hvf:o:", long_opts, &option_index)) != -1) {
        switch (opt) {
        case 'h': puts("Help"); break;
        case 'f':
            printf("File: %s\n", optarg);
            strncpy(a, optarg, 127);
            has_file = 1;
            break;
        case 'o': printf("Output: %s\n", optarg); break;
        case 'v': printf("Version: v%s\n", VERSION); break;
        default: return 1;
        }
    }

    if (has_file)
        printf("Using file: %s\n", a);
    return 0;
}