c语言getopt解析命令行参数实例包括长参数与短参数

#include 
#include 
#include 
void get_option(int argc, char **argv)
{
        char *cmd = argv[0];

        while (1) {
                int option_index = 0;
                struct option long_options[] =
                {
                        {"ip"      , 1, 0, 'i'},
                        {"port"    , 1, 0, 'p'},
                        {"file"    , 1, 0, 'f'},
                        {"type"    , 1, 0, 't'}, //1代表有参数 
                        {"help"    , 0, 0, 'h'}  //0代表没有参数
                };
                int c;

                c = getopt_long(argc, argv, "i:p:f:t:h",long_options, &option_index);  //注意这里的冒号，有冒号就需要加参数值，没有冒号就不用加参数值
                if (c == -1)
                        break;

                switch (c)
                {
                        case 'i':
                                printf("Input arg IP \n");
                                break;

                        case 'p':
                                printf("option p with value '%s'\n", optarg);
                                break;

                        case 'f':
                                printf("option f with value '%s'\n", optarg);
                                break;

                        case 't':
                                printf("option t with value '%s'\n", optarg);
                                //g_cfg.type = optarg;
                                break;

                        case 'h':
                        default:
                                printf("this is default!\n");
                                break;
                }
        }

        return;
}
int main(int argc, char **argv)
{
        get_option(argc , argv);
        return 0;
}