Word Count

#include <stdio.h>

#define SIZE 100
#define IN 1
#define OUT 2

int word_count(char str[]);

int main()
{
    char str[SIZE];

    gets(str);

    printf("%d\n", word_count(str));

    return 0;
}

int word_count(char str[])
{
    int i, state = OUT, count = 0;

    for(i = 0; str[i] != '\0'; i++)
    {
        if((str[i] >= 'a' && str[i] <= 'z' ) || (str[i] >= 'A' && str[i] <= 'Z'))
        {
            if(state == OUT)
            {
                state = IN;
                count++;
            }
        }
        else
            state = OUT;
    }

    return count;
}