Thread: Trying to put numbers from a txt file into an aray, without a huge amount of luck!

Hey guys,
just signed up as I'm pretty sure you can help me with a few things!
I'm pretty new to C, so my code will probably be ridden with noob errors... But... Here it goes!

I'm trying to write a program which reads a set of numbers from a txt file and puts them into an array; trouble is I keep having trouble with EOF errors, which loop type to use etc.

The numbers are stored in the txt file like this:
99
1890
777
6611

So, a new number each line, and only integer numbers.

My code so far is:

Code:

#include <stdio.h>
#include <stdlib.h>
#define TXTFILE "numbers.txt"
FILE *FPTR;                 //File Pointer
int numint;                 //Integer variable to store File contents
int numbarr[100];           //Array to store file contents
int i=0;                    //Iteration counter
int n;                 //Integer variable to contain the number of values in the file

main(void)
{
      printf("Number Analysis Tool\n");
      FPTR = fopen(TXTFILE,"r"); 
      if(!FPTR) 
      {
                   printf("File is missing, empty or corrupted.\n");
      } 
      else
      {
          printf("File opened successfully.\n");
      }
      while((numint = fgetc(FPTR)) != EOF)
      {     
           i++;
      }
      n=i;
      printf("Number of digits within the txt file: %d\n", n);
      getchar();
      int i=0;
      while((numint = fgetc(FPTR)) != EOF && i>=0 && i<=n)
      {
               numbarr[i]=numint;
               putchar(numbarr[i]);
               i++;
      }
      fclose(FPTR); 
      getchar(); 
      
}

It seems to find the number of digits in the txt file ok, which is the variable n, but further than that it doesn't do much. It also compiles completely fine.

Any help is much appreciated!
Cheers,
Will

Are you sure you don't want to end up with something like this?
numarr[0] = 99
numarr[1] = 1890
numarr[2] = 777
numarr[3] = 6611

The way you're going about it now seems to be the slowest way.
FAQ > How do I get a number from the user (C) - Cprogramming.com

Originally Posted by whiteflags

Are you sure you don't want to end up with something like this?
numarr[0] = 99
numarr[1] = 1890
numarr[2] = 777
numarr[3] = 6611

Pretty much, I guess that's an example of a multidimensional array? I'll read up on them, got the big "C programming Language" next to me.

And cheers Salem, those commands should help a hell of a lot!

And wow, quick responses guys! Thx. I went into the garden to do some exercise, came back and POW! Answers! :P

No, that's not a multidimensional array. This is a good link to learn arrays.

Got it working!! Cheers guys