exit---end program execution#include <stdlib.h> void exit(int code);Description
exit to return control from a program to the host operating
environment. Use the argument code to pass an exit status to the
operating environment: two particular values, EXIT_SUCCESS and
EXIT_FAILURE, are defined in `stdlib.h' to indicate success or
failure in a portable fashion.
exit does two kinds of cleanup before ending execution of your
program. First, it calls all application-defined cleanup functions
you have enrolled with atexit. Second, files and streams are
cleaned up: any pending output is delivered to the host system, each
open file or stream is closed, and files created by tmpfile are
deleted.
Returns
exit does not return to its caller.
Portability
ANSI C requires exit, and specifies that EXIT_SUCCESS and
EXIT_FAILURE must be defined.
Supporting OS subroutines required: _exit.