exit
From cppreference.com
Defined in header
<stdlib.h>
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void exit( int exit_code );
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(until C11) | |
_Noreturn void exit( int exit_code );
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(since C11) | |
Causes normal program termination to occur.
Several cleanup steps are performed:
- functions passed to atexit are called, in reverse order of registration
- all C streams are flushed and closed
- files created by tmpfile are removed
- control is returned to the host environment. If
exit_code
is zero or EXIT_SUCCESS, an implementation-defined status, indicating successful termination is returned. Ifexit_code
is EXIT_FAILURE, an implementation-defined status, indicating unsuccessful termination is returned. In other cases implementation-defined status value is returned.
Contents |
[edit] Notes
The functions registered with at_quick_exit are not called.
The behavior is undefined if a program calls exit
more than once, or if it calls exit
and quick_exit
The behavior is undefined if during a call to a function registered with atexit, the function exits with longjmp.
Returning from the the main function, either by a return
statement or by reaching the end of the function, executes exit()
, passing the argument of the return statement (or 0 if implicit return was used) as exit_code
.
[edit] Parameters
exit_code | - | exit status of the program |
[edit] Return value
(none)
[edit] Example
Run this code
Output:
error opening file data.txt in function main()
[edit] See also
causes abnormal program termination (without cleaning up) (function) |
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registers a function to be called on exit() invocation (function) |
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(C99)
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causes normal program termination without completely cleaning up (function) |
C++ documentation for exit
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