How to read from txt file to a matrix

[yasnood]

Hello,

I need to read list of numbers form a txt file to be a matrix in my programe. the matrix i need it to be 3x3 matrix.
thanks for any help

the list of numbers are as follows:

116.068360
-124.401694
8.333333
-124.401694
133.333333
-8.931640
8.333333
-8.931640
0.598306

[whiteflags]

What have you tried?

[yasnood]

I tryed the following:
but it give me the first entry of the matrix onle, i am quite new to programming

#include<stdio.h>

main()
{
    FILE *arr;
    float k;
    arr =fopen("SKelem.txt","r");
    fscanf(arr, "%f", &k);
    printf("%f
", k);
}

[yasnood]

Thanks alot for your response

I know that I should i dentify k as an array but it gives me error.
I am quite new in programming and I should do a big project and this should be written in C.
I hope if I could have some help here?

[whiteflags]

Well if it is right for the first element you can do it for all of them. Use a loop to read from the whole file. When you get all of the input on screen, then you can try shaping it into a matrix.

[yasnood]

I dont know how to do it?
how to do a loop to read from the whole file?
should i define k as a matrix (double k[3][3])?

[whiteflags]

how to do a loop to read from the whole file?

Loop the fscanf() statement until it fails to convert something. fscanf() returns a number to the caller that means how many items from the file were successfully converted into data, or EOF if the file is at the end. You can use that number to create a loop condition.

should i define k as a matrix (double k[3][3])?

It's probably a good idea. I would read a single number into float k; and then assign k somewhere in float matrix[3][3]; That's actually pretty easy. Just make sure that the subscripts for the row and column are within the bounds of the matrix.

[yasnood]

Thank you very much finally it works
I did the following and it works?
thanks alot.

#include<stdio.h>

main()
{
    FILE *arr;
    float k[3][3]={0.0};
    arr =fopen("SKelem.txt","r");
    int i,j;
    
    
    for(i=0 ;i<3; i++)
    {
        for(j=0; j<3; j++)
        {
            fscanf(arr, "%f%*[^\n]%*c",&k[i][j]);
            printf("%f\n", k[i][j]);
        }
    }

}