C程序对命令行参数的处理方法及实例

int main(int argc,char *argv[])
{
  int ch;
  pterr=0;
 
  while((ch=getopt(argc,argv,"a:b::cde"))!=-1)
  {
    printf("optind:%d\n",optind);
    printf("optarg:%s\n",optarg);
    printf("ch:%c\n",ch);
    switch(ch)
    {
      case 'a':
        printf("option a:'%s'\n",optarg);
        break;
      case 'b':
        printf("option b:'%s'\n",optarg);
        break;
      case 'c':
        printf("option c\n");
        break;
      case 'd':
        printf("option d\n");
        break;
      case 'e':
        printf("option e\n");
        break;
      default:
        printf("other option:%c\n",ch);
    }
    printf("optopt+%c\n",optopt);
  }
}

int do_name, do_gf_name;
char *l_opt_arg;

struct option longopts[] = {
    { "name",        no_argument,            NULL,                'n'    },
    { "gf_name",    no_argument,            NULL,                'g'    },
    { "love",        required_argument,    NULL,                'l'    },
    {     0,    0,    0,    0},
};

int main(int argc, char *argv[])
{
    int c;
   
    while((c = getopt_long(argc, argv, ":l:", longopts, NULL)) != -1){
        switch (c){
        case 'n':
            printf("My name is Jay.\n");
            break;
        case 'g':
            printf("Her name is Afra.\n");
            break;
        case 'l':
            l_opt_arg = optarg;
            printf("Our love is %s!\n", l_opt_arg);
            break;
        }
    }
    return 0;
}