.txt to an array

Hello there.
I am a beginner (very beginner) into C programming.
I am trying to take numbers from a .txt and put them into an array to organize them with Shellsort. I also have the problem that there are more than one vector in my .txt, and the first number represents its size, for example:
6 44 56 25 51 11 13 (6 is not a part of it, it only means it has 6 numbers)
4 23 51 6 31 (4 is not a part of it)
But I am having problems trying to fullfill my arrays. Here is what I have (without the Shellsort function, its working nice):

Code:

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int main() {
    FILE    *textfile;
    char    ch;
    int j, i;
   
    textfile = fopen("readme.txt", "r");
    if(textfile == NULL)
        return 1;
   
    fscanf(textfile, "%d", &j);
    int arr[j];

    while((ch = fgetc(textfile))!=EOF) {
        for (i = 1; i < j; i++){
            arr[i] = ch;
}
}
    fclose(textfile);
    return 0;
}

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Could post the text file too? If the file is too big then post a good representation of the file.

Quote:

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Originally Posted by G4143

Could post the text file too? If the file is too big then post a good representation of the file.

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The O/P did:

Quote:

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6 44 56 25 51 11 13 (6 is not a part of it, it only means it has 6 numbers)
4 23 51 6 31 (4 is not a part of it)

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That should sufficient to demonstrate the contents of the data file.

Quote:

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Originally Posted by yunghelor

Code:

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    FILE    *textfile;
    char    ch;

// ...

    while((ch = fgetc(textfile))!=EOF) {

---

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fgetc() returns an int, so ch should be an int so it can hold either a valid character or EOF.

Is there newlines or is it one continuous line of numbers?

Quote:

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Originally Posted by rstanley

The O/P did:


That should sufficient to demonstrate the contents of the data file.

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I want to know if each entry is separated with newlines or not.

Quote:

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Originally Posted by G4143

Could post the text file too? If the file is too big then post a good representation of the file.

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I'm sorry, I don't know how to upload in replies.
The numbers are separateds by normal spaces, but when the "vector" ends, there is a new line to start the next vector.
Their sizes are, in order, 100, 1000, 10000, 100000

Quote:

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Originally Posted by G4143

Could post the text file too? If the file is too big then post a good representation of the file.

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Here is a link to it on my google drive:
Google Drive: Sign-in

Don't use fgetc. Just use fscanf to read the integers. You'll also have to use it to detect EOF. Something like:

Code:

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int n;
while (fscanf(file, "%d", &n) == 1) {
    int a[n];
    for (int i = 0; i < n; ++i)
        fscanf(file, "%d", &a[i]);
    ...
}

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