#define _GNU_SOURCE #include <getopt.h> extern char *optarg; extern int optind, opterr, optopt; int getopt_long(int argc, char *const argv[], const char *optstring, const struct option *longopts, int *longindex); int getopt_long_only(int argc, char *const argv[], const char *optstring, const struct option *longopts, int *longindex);
描述：
#include <stdio.h> #include <stdlib.h> #include <getopt.h> int main(int argc, char **argv) { extern char *optarg; extern int optind, opterr, optopt; int c; int digit_optind = 0; while (1) { int this_option_optind= optind ? optind : 1; int option_index = 0; static struct option long_options[] = { {"add", required_argument, NULL, 0}, {"append", no_argument, NULL, 0}, {"delete", required_argument, NULL, 0}, {"verbose", no_argument, NULL, 0}, {"create", required_argument, NULL, ‘c‘}, {"file", required_argument, NULL, 0}, {0, 0, 0, 0}, }; c = getopt_long(argc, argv, ":abc:d:012", long_options, &option_index); if (c == -1) break; switch (c) { case 0: printf ("option %s", long_options[option_index].name); if (optarg) printf (" with arg %s", optarg); printf ("\n"); break; case ‘0‘: case ‘1‘: case ‘2‘: if (digit_optind != 0 && digit_optind != this_option_optind) printf ("digits occur in two different argv-elements.\n"); digit_optind = this_option_optind; printf ("option %c\n", c); break; case ‘a‘: printf ("option a\n"); break; case ‘b‘: printf ("option b\n"); break; case ‘c‘: printf ("option c with value \"%s\"\n", optarg); break; case ‘d‘: printf ("option d with value \"%s\"\n", optarg); break; case ‘?‘: break; default: printf ("?? getopt returned character code 0%o ??\n", c); } } if (optind < argc) { printf ("non-option ARGV-elements: "); while (optind < argc) printf ("%s ", argv[optind++]); printf ("\n"); } exit(0); }
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原文：http://www.cnblogs.com/water-moon/p/5984108.html