Thread: Hex String to a Long

I'm getting a hexadecimal input from the command line and I can't seem to get it to convert. I know, I know, use strtol(). The problem is I keep getting zero as the result. I hard-code hex strings ("0x13","0XF") and they work fine. I print out the string on the line before the conversion and it looks fine too.

Code:

   result = GetFlag(nargs, args, 'S'); /* gets argument proceeding "-S" */
   fprintf(stdout, "seed=%u \n",seed); /* prints default seed value */
   fprintf(stdout, "result=%s \n",result); /* prints result string */
   if (result != NULL)
      seed = strtoul(result, NULL, 16); /* convert hex string to long */
   fprintf(stdout, "seed=%u \n",seed); /* comes back zero */

result is a char*, and GetFlag returns a char*.

I'm the dumbest man alive... on my console it's hard to tell the difference between a '0' and an 'O'. I've been preceeding the numbers with the letter O this whole time. I guess auto-complete isn't always a good thing.