/*
ferror example: writing error */

#include
<stdio.h>

int
main ()

{

  FILE * pFile;

  pFile=fopen(“myfile.txt”,“r”);

  if (pFile==NULL) perror (“Error
opening file”
);

  else {

    fputc (‘x’,pFile);

    if (ferror (pFile))

      printf (“Error Writing to
myfile.txt\n”
);

    fclose (pFile);

  }

  return 0;

}