C中的getopts，命令行参数

int getopt(int argc, char * const argv[], const char *optstring);

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

int main(int argc, char *argv[]) {
    int opt;
    while ((opt = getopt(argc, argv, "ab:c:")) != -1) {
        switch (opt) {
            case 'a':
                printf("Option a\n");
                break;
            case 'b':
                printf("Option b with argument: %s\n", optarg);
                break;
            case 'c':
                printf("Option c with argument: %s\n", optarg);
                break;
            default:
                printf("Unknown option\n");
                break;
        }
    }
    return 0;
}