close - Close File Associated with Handle

Syntax

#include <io.h>
int close(int handle);

close closes the file associated with the handle. Use close if you opened the handle with open. If you opened the handle with fopen, use fclose to close it.

close returns 0 if it successfully closes the file. A return value of -1 shows an error, and close sets errno to EBADF, showing an incorrect file handle argument.

This example opens the file edclose.dat and then closes it using the close function.

#include <io.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys\stat.h>
#include <stdlib.h>

int main(void)
{
   int fh;

   printf("\nCreating edclose.dat.\n");
   if (-1 == (fh = open("edclose.dat", O_RDWR|O_CREAT|O_TRUNC, S_IREAD|S_IWRITE)
      )) {
      perror("Unable to open edclose.dat");
      return EXIT_FAILURE;
   }
   printf("File was successfully opened.\n");
   if (-1 == close(fh)) {
      perror("Unable to close edclose.dat");
      return EXIT_FAILURE;
   }
   printf("File was successfully closed.\n");
   return 0;

   /****************************************************************************
      The output should be:

      Creating edclose.dat.
      File was successfully opened.
      File was successfully closed.
   ****************************************************************************/
}

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