fclose - Close a file and flush buffer

Definition	#include <stdio.h> int fclose(FILE *fp); fclose closes the file to whose FILE structure the file pointer fp points and releases fp. Memory space that was dynamically allocated for this FILE structure (with fopen or fopen64) is also freed. fclose calls the fflush function before the file is closed.
Return val.	0 EOF	The file has been closed. fclose was not successful, because fp is not assigned to a file (file already closed) or an error occurred when flushing the buffer.
Notes	If the file pointer fp does not point to a FILE structure, the program aborts! Whenever a program is terminated normally or by means of exit, an fclose is automatically executed for each open file. Therefore, you need not call fclose explicitly unless you want to close a file prior to program termination, e.g. to ensure that the limit for open files (=2048) is not exceeded.
Record I/O	Since data is not buffered in the case of record I/O, there is no internal call to the fflush function.
Example	The following program fragment closes the file pointed to by file pointer fp when the end of the file is reached. FILE *fp; if(feof(fp)) fclose(fp);
See also	fflush, close, fdopen, fopen, fopen64, exit