unique words in C

test.c

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

enum { MAX_WORDS = 64, MAX_WORD_LEN = 20 };

int main(void)
{
    char words[MAX_WORDS][MAX_WORD_LEN];
    int  count[MAX_WORDS] = { 0 };
    int w = 0;
    char word[MAX_WORD_LEN];
    int c;
    int l = 0;

    while ((c = getchar()) != EOF)
    {
        if (isalpha(c))
        {
            if (l < MAX_WORD_LEN - 1)
               word[l++] = c;
            else
            {
                fprintf(stderr, "Word too long: %*s%c...\n", l, word, c);
                break;
            }
        }
        else if (l > 0)
        {
            word[l] = '\0';
            printf("Found word <<%s>>\n", word);
            assert(strlen(word) < MAX_WORD_LEN);
            int found = 0;
            for (int i = 0; i < w; i++)
            {
                if (strcmp(word, words[i]) == 0)
                {
                    count[i]++;
                    found = 1;
                    break;
                }
            }
            if (!found)
            {
                if (w >= MAX_WORDS)
                {
                    fprintf(stderr, "Too many distinct words (%s)\n", word);
                    break;
                }
                strcpy(words[w], word);
                count[w++] = 1;
            }
            l = 0;
        }
    }

    for (int i = 0; i < w; i++)
        printf("%3d: %s\n", count[i], words[i]);

    return 0;
}