The longest word

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

int main()
{
char str[255];
int count = 0, i, id, max = 0;
printf("Insert: ");
gets_s(str);
for (i = 0; i < strlen(str) - 1; i++) {
if (str[i] != ' ') count += 1;
else {
if (count > max) {
max = count;
id = i - count;
}
count = 0;
}
}
max += id;
for (i = id; i < max; i++) putchar(str[i]);
printf("\n");
return 0;
}