Inputing a file to an array

[m-kosier]

I made a simple program to input a text file into an array and then have have the user search for any number in the array. The search function works fine, I have tested it multiple times. But for some reason I cant get the text file to input into the array. Here is the code in the main c file:

#include <stdio.h>

#include <stdlib.h>

#include "search.h"

#include "filereader.h"


int main ()

{

  FILE *ifp;

  ifp = fopen("test.txt", "r");


  int index, size, number, x, i;


  printf("What number do you want to find?: ");

  scanf("%d",&number);


  size = 0;

  i = 0;

  while ((fscanf(ifp, "%d", &x)) == 1)

    {

      size++;

      i++;

    }

  

  int *num = malloc(size * sizeof(int));

  FileReader(ifp, num);

  

  for(i = 0; i < size; i++)

    printf("%d", num[i]);


  index = Search(num, size, number);

  fclose(ifp);


  if(index != -1)

    printf("Found it in index: %d\n", index);

  else

    printf("Didn't find it\n");


}

and here is the code for the file reader function:

#include <stdlib.h>

 
#include "filereader.h"


 
void FileReader(FILE *fp, int *numArray)

 
{

 
  int i, x;

 
  i = 0;

 
  while ((fscanf(fp, "%d", &x)) == 1)

 
    {

 
      numArray[i] = x;

 
      i++;

 
    }

 
}

When i put the code that is in the FileReder function in main it works perfectly but when I try to use an outside function to read in the file it doesn't work. I ouput the array in main to see what it stored in it and it's always all 0's. Please help

[CommonTater]

By the time you call your file reader function you're already at the end of the file.... OOPs, nothing to read.

Also don't be double and triple line spacing... it does not make your code any easier to read.

[m-kosier]

Thank you! I just changed how I found the size of the file. But is there a way to go back to the beginning of the file besides closing it and re-opening it?
Sorry about the spacing it did that when I copied it over

[stahta01]

But is there a way to go back to the beginning of the file besides closing it and re-opening it?

fseek - C++ Reference

[CommonTater]

Thank you! I just changed how I found the size of the file. But is there a way to go back to the beginning of the file besides closing it and re-opening it?
Sorry about the spacing it did that when I copied it over

No worries about spacing... just a reminder.

To get back to the beginning of the file you can use

fseek(file, 0, SEEK_SET);  // set pointer in file 0 bytes from origin

//or

rewind(file);   // rewind to beginning