Thread: strcmp, any borders?

Are you talking about passing strcmp a NULL argument? If so then of course the program will break, strcmp is more often than not written to assume that both arguments are valid pointers which can be dereferenced and end with a nul character ('\0'). A NULL pointer cannot be dereferenced so strcmp chokes on it.

-Prelude

This part of your code is also troublesome (the bold part)

Code:

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


if (argc < 2)
//Usage Menu

else if (strcmp (argv[1], "/usageone") == 0)
{
//Usage one
}
else if (strcmp (argv[1], "/usagetwo") == 0)
{
       if (strcmp (argv[2], NULL) == 0)
       {
       printf("No second usage!\n");
       return 0;
       }
       else
       // Usage two
}
else
{
printf("no usage!\n");
return 0;
}
}

Your comment leads me to believe you omitted code after the if statement for the sake of simplicity. However, if this isn't the case you should be getting an error.

[edit]
It just occured to me that I may be dealing with a newbie here so I should probably explain why this could be trouble. After any if statement you need either braces that enclose a set of commands, or a single command following the if. So you would just do

Code:

if(whatever)
   ;

[/edit]