logic101:

Write a function with the following prototype:
int tokenise(char str[], int start, char result[]);

The function should find the next token starting at index 'start'
in the string 'str'. The token should be copied into the string
'result', which is another character array passed to the function,
so that the string is communicated back to the caller.

The function returns an integer value, which should be the next
position in 'str' after the returned token. Next time the function is
called, this will be the next value of start. If there are no more
tokens, then the returned integer value should be -1.

You might use this function as follows:
char line[] = "Nothing but the rain";
char result[256];
char start;

start = tokenise(line, 0, result);
while ( start != -1 ) {
  printf("%s\n", result);
  start = tokenise(line, start, result);
}

omo_to_dun:

So dell_net, what was wrong with the prototype?

You might use this function as follows:
char line[] = "Nothing but the rain";
char result[256];
char start;

start = tokenise(line, 0, result);

 char line[] = "If I had used char, the result would have been the same."
	   "Since the prototype is int, the char would be promoted to int because "
	   "the number of bits required to represent the latter is larger than that to represent the former. "
	   "If you don't believe me, run my code, with the int changed to char."
	   "For other doubting Thomases and C newbies, let me take the pain of showing it to you, again:";