#include <iostream>
#include <getopt.h>
#define no_argument 0
#define required_argument 1
#define optional_argument 2
int main(int argc, char * argv[])
{
std::cout << "Hello" << std::endl;
const struct option longopts[] =
{
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{"stuff", required_argument, 0, 's'},
{0,0,0,0},
};
int index;
int iarg=0;
//turn off getopt error message
opterr=1;
while(iarg != -1)
{
iarg = getopt_long(argc, argv, "svh", longopts, &index);
switch (iarg)
{
case 'h':
std::cout << "You hit help" << std::endl;
break;
case 'v':
std::cout << "You hit version" << std::endl;
break;
case 's':
std::cout << "You hit stuff" << std::endl;
break;
}
}
std::cout << "GoodBye!" << std::endl;
return 0;
}
Output:
./a.out -s
Hello
You hit stuff
GoodBye!
Output:
./a.out --stuff
Hello
./a.out: option `--stuff' requires an argument
GoodBye!
Conflict needing resolved: Both -s & --s should say: ./a.out: option `--stuff' requires an argument when used without proceeding arguments following the command. But only --stuff does? Does anyone know what I'm missing here?
Desired result:
./a.out -s
Hello
./a.out: option `--stuff' requires an argument
GoodBye!
./a.out --stuff
Hello
./a.out: option `--stuff' requires an argument
GoodBye!
Your getopt_long call specifies "svh" for the short options when it should say "s:vh". The colon tells getopt to require an argument for "s".