Time is Basic Elements to ALL

Because of we need to sync the timer of linux server.. The system provided service is too active to try to connect unknow server, so, write a C prog to do it..

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void print_usage(const char *program_name) {
    printf("Usage: %s [OPTIONS]\n", program_name);
    printf("Options:\n");
    printf("  -d, --debug    Enable debug output\n");
    printf("  -h, --help     Display this help message\n");
}

You can use ‘-h/–help’ to print the help info.