Re: [Dev-C++] File Size

[Lukas 'C. M. <gry...@gm...>]

Hello, Jarren!

Code follows below.  Hope it helps/is useful.  Just drop it into the
main file of a new console app and all should go well.

Please tell me if I've overlooked anything or you're curious about somethin=
g.

-Lukas

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[])
{
  printf("File name: ");
  char fname[80];
  fgets(fname,sizeof(fname),stdin); // grab file name from user
  fname[strlen(fname) - 1] =3D 0;
  // put a null character at the last place of the string to ensure
that display works properly
  // (to find out why, comment that line out and recompile)
  FILE *fp =3D fopen(fname,"r"); // Open the file as an ascii read-only fil=
e
  if (!fp) return 0; // File doesn't exist/can't be accessed/etc. =20
  char first[5];
  memset(first,0,sizeof(first)); // Ensure that the string will be blank
  fread(first,sizeof(first)-1,sizeof(char),fp); // Read three
characters in from the file
  first[strlen(first)-1] =3D 0; // as like last time (9th line)
  printf("First %d characters of file: %s\n",sizeof(first)-2,first);
  fseek(fp,0,SEEK_END); // Jumps to end of file
  unsigned long int fsize =3D ftell(fp); // Returns position in file
  printf("Size of file: %ld\n", fsize);
  fseek(fp,-2,SEEK_END);
  // Jumps back two from current position in file.  Could also use SEEK_CUR
  // as we're at the end
  // of the file, but this works because we've jumped to the end.
  char last[4];
  memset(last,0,sizeof(last)); // same as before
  fread(last,sizeof(last)-1,sizeof(char),fp); // read two characters from f=
ile
  last[sizeof(last) - 1] =3D 0; // same as before
  printf("Last %d characters of file: %s\n\n",sizeof(last)-2,last); =20
  fclose(fp); // close the file
  system("PAUSE");=09
  return 0;
}

On 6/17/05, Jarren Long <vb...@gm...> wrote:
> Ok, what I need to do is open up a file and get the exact number of
> bytes in the file, including the first three and the last two
> characters, all stored in seperate variables. Example:
>=20
> //start file.txt
> This is a simple text file
> //end file.txt
>=20
> I want to be able to get this:
> Thi
> 36
> le
>=20
> I have no clue where to start. Any help would be great
>=20
> Cheers!