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   fclose

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

   Description
   fclose closes the file associated with the stream fp. Any data in  the
   output buffer for fp is flushed (written to the file) before closing.

   Example
   #include <stdio.h>
   main()
   {
   FILE *fp;
        fp = fopen("file.dta","r");
        if(fp == NULL)
             printf("Datafile not opened\n");
        else
        {
             fclose(fp);
             printf("File file.dta closed using fclose\n");
        }
   }

   Return Value
   fclose  returns 0 if the stream successfully closed. A -1 is  returned
   on error.