写在前面:
对于可选参数一定要使用以下两种方法标明其值 –wValue 或--who==Value 而不能是 --who Value,
而对于必填参数则可以使用-lValue 或 --love Value或--love=Value,
这并不是bug.
//============================================================================
// Name : TestOpt.cpp
// Author : yangyh
// Version :
// Copyright : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================
#include <iostream>
#include <getopt.h>
using namespace std;
int version;
struct option longopts[] = {
{ "version", no_argument, &version, 'v' },
{ "name", no_argument, NULL, 'n' },
{ "love", required_argument, NULL,'l' },
{ "who",optional_argument,NULL,'w'},
{ 0, 0, 0, 0 }
};
int main(int argc, char *argv[]) {
int c;
while ((c = getopt_long(argc, argv, "vl:w::", longopts, NULL)) != -1) {
switch (c) {
case 'l':
printf("love = %s!\n", optarg);
break;
case 0:
//
printf("getopt_long()设置变量 : version = %c\n", version);
break;
case 'v':
printf("version..\n");
break;
case 'w':
printf("who = %s\n",optarg);
break;
}
}
return 0;
}