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：
#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;}