reading from file and storing in array for Linear Regression (C)

[digs]

Hi There,

I am learning C for university and I am stuck on a question.

I am trying to achieve the following.

1. Read Data from file - This works

int readfile()
{
    FILE *fptr;
    char filename[15];
    char ch;
 
 
    printf("Enter the filename to be opened \n");
    scanf("%s", filename);
    /*  open the file for reading */
    fptr = fopen(filename, "r");
    if (fptr == NULL)
    {
        printf("Cannot open file \n");
        exit(0);
    }
    ch = fgetc(fptr);
    while (ch != EOF)
    {
       ch = fgetc(fptr);
    }
    fclose(fptr);
}

2. Store data read from file into two arrays (this data is comma delimited).

3. Perform mathematical calculation on the values. - this is done, albeit manual entry at the moment.



The data is stored as per below:

x,y
x1,y1
x2,y2
...
xn,yn

The data also varies in size (so the file could be 30 lines of x and y co-ordinates, or 100).


Any pointers would help.

Thanks

[dev7060]

fscanf() seems a good option to use here. You can use it like:

...
while(fscanf(fptr, "%f,%f", &var1, &var2)==1){
  //Perform calculations
}
...