Command Line agruments

lazyuser · 05-06-2005, 12:48 AM

Hello,

I'm trying to familiarize myself with argc, and argv, but I am misisng someting and any help would be appericated.

My code is as follows:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{

if (*argv[1] == 'h')
{
printf("help\n");
}

return 0;

}

WHen I run the program, it seg faults, but if I run it with the command line agrument h, it prints the message. So what I want to do is:

./1

return nothing

./1 h

print help

Any help would be great.

Lazyuser

gobi_dgm · 05-06-2005, 01:21 AM

It solves ur problem. The errors occured bcoz, u r trying to get the 1st element in char array, when it is empty.

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int main(int argc,char *argv[])
{
printf("%d:",argc);
if(argc>1)
{
if (*argv[1] == 'h')
{
printf("help\n");
}
return 0;
}
}

Pl update your profile..

lazyuser · 05-06-2005, 01:34 AM

Thanks,

That was exactly what I was looking for, also updated my profile, but not much to put in there.

Thanks again,

Lazyuser