Using strtok/dividing up strings

[Leto]

Hey... I'm very much a newbie to C and was hoping someone might be able to offer some help or just point me in the right direction, thanks. ^_^.

Anyway, my program is supposed to read in a line from stdin and then break the line into words. It does this okay, but I don't know how I could modify it so that it will only continue assigning values to the variables *if* there are values to assign.

Like, the current code (where 'search' is a space and 'end' is a newline character) is:

first = strtok(s, search);
second = strtok(NULL,search);
third = strtok(NULL, search);
fourth = strtok(NULL,end);

This is fine if the input is four words as expected, but what I was wondering if someone could suggest some way to kind of check, like, if there are more words in the string. I'm more used to working in Java so I must admit my understanding of strtok is not very strong in C; there may be some much better way of approaching the problem.

Anyway, I guess it's a very simple question so hopefully it can be cleared up easily, thanks.

-Leto ^_^.

[Monster]

Just remove the newline character at the end of your string. The strtok function will return a NULL pointer when reaching the end of the string:

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

int main ()
{
   char buf[BUFSIZ];
   char *ptr = NULL;

   if(fgets(buf, BUFSIZ, stdin) == NULL)
      return -1;

   /* remove newline character */
   if((ptr = strchr(buf, '\n')) != NULL) *ptr = '\0';

   if((ptr = strtok(buf, " ")) != NULL)
   {
      printf("[%s]\n", ptr);
      while((ptr = strtok(NULL, " ")) != NULL)
         printf("[%s]\n", ptr);
   }
   return 0;
}