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`fclose'--close a file

     #include <stdio.h>
     int fclose(FILE *FP);
If the file or stream identified by FP is open, `fclose' closes it,
after first ensuring that any pending data is written (by calling
`fclose' returns `0' if successful (including when FP is `NULL' or not
an open file); otherwise, it returns `EOF'.
`fclose' is required by ANSI C.
   Required OS subroutines: `close', `fstat', `isatty', `lseek',
`read', `sbrk', `write'.