Terminate the calling process after cleanup (exit) or immediately (_exit).
Code:
void exit(
int status
);
void _exit(
int status
);
Parameters
status
Exit status.
Remarks
The exit and _exit functions terminate the calling process. exit calls, in last-in-first-out (LIFO) order, the functions registered by atexit and _onexit, then flushes all file buffers before terminating the process. _exit terminates the process without processing atexit or _onexit or flushing stream buffers. The status value is typically set to 0 to indicate a normal exit and set to some other value to indicate an error.
Although the exit and _exit calls do not return a value, the low-order byte of status is made available to the waiting calling process, if one exists, after the calling process exits. The status value is available to the operating-system batch command ERRORLEVEL and is represented by one of two constants: EXIT_SUCCESS,
which represents a value of 0, or EXIT_FAILURE,
which represents a value of 1. The behavior of exit, _exit, _cexit, and _c_exit is as follows.