int main (int argc, char **argv)
{
int oc; /*选项字符 */
char *b_opt_arg; /*选项参数字串 */
while((oc = getopt(argc, argv, "ngl:")) != -1)
{
switch(oc)
{
case 'n':
printf("My name is Lyong.\n");
break;
case 'g':
printf("Her name is Xxiong.\n");
break;
case 'l':
b_opt_arg = optarg;
printf("Our love is %s\n", optarg);
break;
}
}
return 0;
}
运行结果:
$ ./opt_parse_demo -n
My name is Lyong.
$ ./opt_parse_demo -g
Her name is Xxiong.
$ ./opt_parse_demo -l forever
Our love is forever
$ ./opt_parse_demo -ngl forever
My name is Lyong.
Her name is Xxiong.
Our love is forever
int main (int argc, char **argv)
{
int oc; /*选项字符 */
char *b_opt_arg; /*选项参数字串 */
while((oc = getopt(argc, argv, "ngl:")) != -1)
{
switch(oc)
{
case 'n':
printf("My name is Lyong.\n");
break;
case 'g':
printf("Her name is Xxiong.\n");
break;
case 'l':
b_opt_arg = optarg;
printf("Our love is %s\n", optarg);
break;
case '?':
printf("arguments error!\n");
break;
}
}
return 0;
}
输入一个错误的命令行,结果如下:
$ ./opt_parse_demo -l
./opt_parse_demo: option requires an argument -- l
arguments error!
int main (int argc, char **argv)
{
int oc; /*选项字符 */
char ec; /*无效的选项字符*/
char *b_opt_arg; /*选项参数字串 */
while((oc = getopt(argc, argv, ":ngl:")) != -1)
{
switch(oc)
{
case 'n':
printf("My name is Lyong.\n");
break;
case 'g':
printf("Her name is Xxiong.\n");
break;
case 'l':
b_opt_arg = optarg;
printf("Our love is %s\n", optarg);
break;
case '?':
ec = (char)optopt;
printf("无效的选项字符 \' %c \'!\n", ec);
break;
case ':':
printf("缺少选项参数!\n");
break;
}
}
return 0;
}
测试结果:
$ ./opt_parse_demo -a
无效的选项字符 ' a '!
$ ./opt_parse_demo -l
缺少选项参数!