The number of words (strings)

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

int main()
{
char str[255];
int count = 0, i;
printf("Insert: ");
gets_s(str);
for (i = 0; i < strlen(str) - 1; i++)
if ((str[i] == ' ') && (str[i + 1] != ' '))
count++;
if (str[0] != ' ') count++;
printf("\nConclusion: %d\n", count);

return 0;
}