afds

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

static int match_letters(const char* word1, char* word2, int c)
{
        char *p1 = word1;
        char *p2 = word2;
        int match = 0;

        /* find all the occurence of char 'c' in word1 */
        while (*p1) {
                if (*p1 == (char)c) {
                        *p2 = (char)c;
                        match++;
                }
                p1++;
                p2++;
        }

        return match;
}

int main(void)
{
        static const char sample_word[] = "facebook";
        static char input_word[sizeof sample_word] = { 0 };
        int c;
        int tries = 0;
        int match = 0;
        int m;

        /* just fill in our input word with asterisk */
        for (c = 0; c < sizeof sample_word; c++) {
                input_word[c] = '*';

        }

        while (tries < 3) {
                printf("\nword is: %s\n", input_word);
                printf("enter a letter: ");
                c = getchar();
                while (getchar() != '\n');

                if (m = match_letters(sample_word, input_word, c)) {
                        match += m;

                        printf("match = %d, m = %d\n", match, m);
                        if (match == strlen(sample_word)) {
                                printf("done.\n");
                                break;
                        }
                        continue;
                }

                tries++;
                printf("number of tries left: %d\n", tries);
        }

        return 0;
}