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migf1 έγραψε:Κάνε το αρχικά όπως λες.

Μορφοποιημένος Κώδικας: Επιλογή όλων

#include <stdio.h>   // printf(), puts(), scanf(), putchar()
#include <stdlib.h>  // malloc(), free(), exit(), EXIT_SUCCESS, EXIT_FAILURE
#include <string.h>  // strcmp(), strcpy()
#include <ctype.h>   // tolower()

#define LEN_WORD      (30+1)
#define LEN_ALPHABET  26

typedef struct node {
    char word[LEN_WORD];
    struct node *next;
} Node;

typedef struct {
	Node *head;
	int len;
} List;


Node *add_to_list(Node *n, char *s)
{
    Node *new_node = malloc(sizeof(Node));

    if (new_node == NULL)
        return NULL;

    strcpy(new_node->word, s);
    new_node->next = n;
    return new_node;
}

void list_print(Node *n)
{
    for (; n != NULL; n = n->next)
        printf("%s ", n->word);
    putchar('\n');
}

void list_destroy(Node *n)
{
    if (n == NULL)
        return;

    Node *dummy = NULL;
    for (; n != NULL; n = dummy) {
        dummy = n->next;
        free(n);
    }
}

void lowerize(int n, char s[n])
{
    for (int i = 0; i < n; i++) {
        s[i] = tolower(s[i]);
        if (!s[i])
            return;
    }
}


int main(void)
{
    char word[LEN_WORD];
    List alphabet[LEN_ALPHABET];

    for (int i = 0; i < LEN_ALPHABET; i++) {
        alphabet[i].head = NULL;
        alphabet[i].len = 0;
    }

    for (;;) {
        scanf("%s", word);
        lowerize(LEN_WORD, word);

        int c = word[0] - 'a';

        if (c < 0)
            c = 0;
        else if (c > LEN_ALPHABET)
            c = LEN_ALPHABET;

        alphabet[c].head = add_to_list(alphabet[c].head, word);
        if (alphabet[c].head == NULL)
            goto exit_failure;
        alphabet[c].len++;

        if (!strcmp(word, "stop"))
            break;
    }

    int num_words = 0;
    putchar('\n');

    for (int i = 0; i < LEN_ALPHABET; i++) {
        if (alphabet[i].len) {
            printf("%c (%d words): ", i + 'a', alphabet[i].len);
            list_print(alphabet[i].head);
            num_words += alphabet[i].len;
            list_destroy(alphabet[i].head);
        }
    }
    printf("\nyou have typed %d words in total (including \"stop\")\n", num_words);
    exit(EXIT_SUCCESS);

exit_failure:
    for (int i = 0; i < LEN_ALPHABET; i++)
        list_destroy(alphabet[i].head);
    exit(EXIT_FAILURE);
}