Thread: .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:

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;
}

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

Originally Posted by G4143

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

The O/P did:

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)

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

Originally Posted by yunghelor

Code:

    FILE    *textfile;
    char    ch;

// ...

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

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?

Originally Posted by rstanley

The O/P did:


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

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

Originally Posted by G4143

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

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

Originally Posted by G4143

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

Here is a link to it on my google drive:
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