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ferror

Usage

   #include <stdio.h>
   int ferror(FILE *fp);

   ANSI

Description

   ferror checks the error flag on the stream fp. The error flag remains set
   until a clearerr, rewind or fseek is issued or the stream is closed. No
   read or write operations can be carried out until this flag is cleared.

Example 

   #include <stdio.h>

   #include <stdlib.h>

   int main()
   {
       int c;
       if ( (c = fgetc(stdin)) == EOF)
           if (ferror(stdin))
               {
                   fprintf(stderr,"Read error\n");
                   clearerr(stdin);
                   return EXIT_FAILURE;
               }
       printf("No error\n");
       return EXIT_SUCCESS;
   }

Return Value

   Returns non-zero if the error flag is set, otherwise it returns a zero.

See Also

   clearerr, feof