function

feof

<cstdio>
int feof ( FILE * stream );
Check End-of-File indicator
Checks whether the End-of-File indicator associated with stream is set, returning a value different from zero if it is.
This indicator is generally set by a previous operation on the stream that reached the End-of-File.
Further operations on the stream once the End-of-File has been reached will fail until either rewind, fseek or fsetpos is successfully called to set the position indicator to a new value.

Parameters

stream
Pointer to a FILE object that identifies the stream.

Return Value

A non-zero value is returned in the case that the End-of-File indicator associated with the stream is set.
Otherwise, a zero value is returned.

Example

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/* feof example: byte counter */
#include <stdio.h>
int main ()
{
  FILE * pFile;
  long n = 0;
  pFile = fopen ("myfile.txt","rb");
  if (pFile==NULL) perror ("Error opening file");
  else
  {
    while (!feof(pFile)) {
      fgetc (pFile);
      n++;
      }
    fclose (pFile);
    printf ("Total number of bytes: %d\n", n-1);
  }
  return 0;
}


This code opens the file called myfile.txt, and counts the number of characters that it contains by reading all of them one by one. Finaly the total amount of bytes is printed out.

See also

clearerr
Clear error indicators (function)
ferror
Check error indicator (function)