split a a string into array of stings with C

array_split_demo.c

/**
 * Meithal @github
 *
 * Splits a string into several strings every new line and return a pointer to the first one
 * The very last string will be \0
 * Will be ub for lines > 50
 * Doesn't free
 * Doesnt check for several functions return values
 */

char ** string_into_arrays(char * string) {

    int nb_of_words = 0;
    for (char *letter = string; *letter != '\0'; letter++)
        if (*letter == '\n')
            ++nb_of_words;

    char ** array_words = calloc((size_t) nb_of_words + 2,  sizeof(char *));

    for(
        char
                * start             = string,
                **word              = array_words - 1,
                position_letter     = 0;
        *string != '\0' ;
        string++
        )
    {
        if(string == start || *string == '\n') {
            word ++;
            *word = malloc(50);
            memset(*word, 0, 50);
            position_letter = 0;
        }

        if(*string == '\r' || *string == '\n')
            continue;
        else {
            (*word)[position_letter++] = *string;
        }
    }

    return array_words;
}

int main() {
    FILE * fwords = fopen("words.txt", "rb");
    if (fwords == NULL) {
        puts("System failure opening the word file\n");
        return EXIT_FAILURE;
    }
    fseek(fwords, 0L, SEEK_END);
    size_t file_size = (size_t) ftell(fwords);
    rewind(fwords);
    char* words = malloc(file_size);
    fread(words, sizeof(char), file_size, fwords);
    fclose(fwords);
    fwords = NULL;

    char ** arr_words = string_into_arrays(words);

    int number_of_words = 0;
    while (arr_words[number_of_words] != NULL )
        puts(arr_words[number_of_words++]);

}