FILE

The FILE type is defined in stdio.h. It specifies the structure used in all stream I/O operations. The fields of this structure store information about the current state of the stream. The FILE type is used as shown in the following example:

#include <stdio.h>
void capture_file (char mode)
{
  FILE *f;
  .
  .
  .
  f = fopen (filename,fmode);        /* open a file for writing          */
  if (f == NULL)
  {
     printf ("\nCan not open file!\n");/* error when trying to open file */
     return;
  }
                                     /* read line-edited serial input    */
  .
  .
  .
  fclose (f);                        /* close the output file            */
  printf ("\nFile closed.\n");
}