Store words in char array C language

Question

I have this code:

char *pch;
pch = strtok(texto," ");

while (pch != NULL)
{
  pch = strtok (NULL, " ");
}

My "texto" variable have something like "This is my text example".

And i need to store each value comming from pch in while, in an array of characteres, but i really dont know how to do it.

I need something like that, each value in array will have a word, so:

"This is my text example".

Array[0][20] = This;

Array[1][20] = is;

Array[2][20] = my;

Array[3][20] = text;

Array[4][20] = example;

The pch in while having all these words already split, but I don't know how to add into a char array, or how I will declare him too.

By using `strcpy` - at the start of the `while` loop, before the next call to `strtok`. How to declare him? `char Array[MAXWORDS][MAXWORDLEN+1];` — Weather Vane, Jun 04 '17 at 18:11
But this Array[i++], how i can declare with the exat size of words i need ? — Jokes on me, Jun 04 '17 at 18:15
For a simple 2-D array, all word storage has the same max length. The case where the storage length is variable, is more complicated, go there later. — Weather Vane, Jun 04 '17 at 18:17

VolAnd · Accepted Answer · 2017-06-05T07:42:14.407

3

Consider the following example:

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

#define MAXSTRLEN 20
#define MAXWORD 6

int main(void)
{
    char arr[MAXWORD][MAXSTRLEN+1] = {0};
    char str[] ="This is my text example";
    char *pch;
    int i = 0;
    pch = strtok (str," ");
    while (pch != NULL && i < MAXWORD)
    {
        strncpy(arr[i++], pch, MAXSTRLEN);
        pch = strtok (NULL, " ");
    }
    return 0;
}

edited Jun 05 '17 at 07:42

answered Jun 04 '17 at 18:34

VolAnd

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Recommend `while (pch != NULL)` --> `while (i < 6 && pch != NULL)` – BLUEPIXY Jun 04 '17 at 18:38
1

@BLUEPIXY Yes, good suggestion - MAXWORD added to define number of token. – VolAnd Jun 05 '17 at 07:43
3

I've always liked `for (pch=strtok(str," "); i < MAXWORD && pch; pch=strtok(NULL, " \n")) strncpy(arr[i++], pch, MAXSTRLEN);` Either is fine, with the `for` you handle the initial and all subsequent calls in the one expression of the loop. – David C. Rankin Jun 05 '17 at 07:51

Shashwat Kumar · Answer 2 · 2017-06-04T18:38:56.070

0

This should work. Use strcpy to copy pch to character array.

char str[] ="This is my text example";
char *pch;
int i = 0;
pch = strtok (str," ");
char a[10][20];
while (pch != NULL)
{   
  strcpy(a[i++], pch);
  pch = strtok (NULL, " ");
}

And as @stackptr has suggested dont use strtok and instead use strtok_r . For more info on this.

edited Jun 04 '17 at 18:38

answered Jun 04 '17 at 18:32

Shashwat Kumar

5,159
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Store words in char array C language

2 Answers2