菜鸟求问一个Advanced Linux Programming里的问题
Mark Mitchell，Jeffery Oldham等写的书
里面第二章 Writing Good GNU/Linux Software 的 2.1.3节 Using getopt_long

里面程序已经写好，这个程序的意图也知道，已经用gcc编译过了，编译后文件为getopt_long
但是不知道怎么用，怎么测试
网上找半天找不到，我想这么测试来着
./getopt_long -hv
但是感觉结果乖乖的，不是应该有的
希望高手给知道下，菜鸟求知道啦

代码如下：

C/C++ code

#include <getopt.h>#include <stdio.h>#include <stdlib.h>/*The name of this program.*/const char * program_name;/*Prints usage information for this program to STREAM(stdout or stderr),and exit the program with EXIT_CODE.Does not return.*/void print_usage(FILE * stream, int exit_code){  fprintf(stream, "Usage: %s options[inputfile ...]\n", program_name);  fprintf(stream,      "  -h --help              Display this usage information.\n "      "  -o --output filename   Write output to file.\n "      "  -v --verbose           Print verbose messages.\n ");  exit(exit_code);}/*Main program entry point. ARGC contains number of argument list elements;ARGV is an array of pointers to them.*/int main(int argc, char * argv[]){  int next_option;  /*A string listing valid short options letters.*/  const char * const short_options = "ho:v";  /*An array describing valid long options.*/  const struct option long_options[] = {    {"help",   0, NULL, 'h'},    {"output", 1, NULL, 'o'},    {"verbose",0, NULL, 'v'},    {NULL,     0, NULL,  0 }   /*required at end of array.*/  };  /*the name of the file to receive program output,  or NULL for standard output.*/  const char * output_filename = NULL;  /*whether to display verbose messages.*/  int verbose = 0;  /*remember the name of the program,to incorporate in messages.   The name is stored in argv[0].*/  program_name = argv[0];  do{    next_option = getopt_long(argc, argv, short_options, long_options, NULL);    switch(next_option){    case 'h':/*-h or --help*/      /*User has requested usage information.Print it to standard output,       and exit with exit code zero(normal termination).*/      print_usage(stdout, 0);    case 'o':/*-o or --output*/      /*This option takes an argument,the name of the output file.*/      output_filename = optarg;      break;    case 'v':/*-v or --verbose*/      verbose = 1;      break;    case '?':/*The user specified an invalid option.*/      /*Print usage information to standard error,and exit with             exit code one(abnormal termination).*/      print_usage(stderr, 1);    case -1:/*done with options.*/      break;    default:/*sth else:unexpected.*/      abort();    }  }  while(next_option != -1);  /*Done with options.OPTIND points to first nonoption argument.   For demonstration purposes,print them if the verbose option was specified.*/  if(verbose){    int i;    for(i = optind; i < argc; ++i)      printf("Argument: %s\n",argv[i]);  }  /*The main program goes here*/  return 0;}