Question

How to insert all the words of a text file into an array in C

Answer 1

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

char** extract_words(char filename[], int size, int* total_words) {
    FILE* fp = fopen(filename, "r");

    if (fp == NULL) {
        printf("Error open file\n");
        exit(EXIT_FAILURE);
    }

    char word[32];
    char** array = malloc(sizeof(char*) * size);

    while (fscanf(fp, "%s", word) != EOF) {
        array[*total_words] = _strdup(word);
        (*total_words)++;
    }

    fclose(fp);

    return array;
}


int main()
{
    char filename[32] = "d:\\data.txt";
    int size = 1024, total_words = 0;

    char** array = extract_words(filename, size, &total_words);

    for (int i = 0; i < total_words; i++) {
        printf("%s\n", array[i]);
        free(array[i]);
    }

    free(array);

    return 0;
}




/*
run:

C
is
a
general-purpose
programming
language.
It
was
created
in
the
1970s
by
Dennis
Ritchie
and
remains
very
widely
used
and
influential.

*/

 

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Answer 2

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

char** extract_words(char filename[], int size, int *total_words) {
    FILE* fp = fopen(filename, "r");

    if (fp == NULL) {
        printf("Error open file\n");
        exit(EXIT_FAILURE);
    }

    char buffer[255];
    char word[32];
    char **array = malloc(sizeof(char *) * size);

    while (fgets(buffer, 255, fp) != NULL) {
        char *p;

        p = strtok(buffer, " ,.-\n");
        while (p != NULL) {
            array[*total_words] = _strdup(p);
            (*total_words)++;
            p = strtok(NULL, " ,.-\n");
        }
    }

    fclose(fp);

    return array;
}


int main()
{
    char filename[32] = "d:\\data.txt";
    int size = 1024, total_words = 0;

    char **array = extract_words(filename, size, &total_words);

    for (int i = 0; i < total_words; i++) {
        printf("%s\n", array[i]);
        free(array[i]);
    }

    free(array);

    return 0;
}




/*
run:

C
is
a
general
purpose
programming
language
It
was
created
in
the
1970s
by
Dennis
Ritchie
and
remains
very
widely
used
and
influential

*/

 

70+ SQL courses for beginners and professionals