Syntax

#include <stdio.h>
void clearerr (FILE *stream);

The clearerr function resets the error indicator and end-of-file indicator for the specified stream. Once set, the indicators for a specified stream remain set until your program calls clearerr or rewind. fseek also clears the end-of-file indicator.

There is no return value.

This example reads a data stream and then checks that a read error has not occurred.

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

FILE *stream;
int c;

int main(void)
{
   if (NULL != (stream = fopen("file.dat", "r"))) {
      if (EOF == (c = getc(stream))) {
         if (feof(stream)) {
            perror("Read error");
            clearerr(stream);
         }
      }
   }
   return 0;

   /****************************************************************************
      If file.dat is an empty file, the output should be:

      Read error: Attempted to read past end-of-file.

   ****************************************************************************/
}

• feof
  
• ferror
  
• perror
  
• rewind
  
• strerror
  
• strerror

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