EXIT_SUCCESS, EXIT_FAILURE
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                    |   Defined in header  
<cstdlib>
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|   #define EXIT_SUCCESS /*implementation defined*/ 
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|   #define EXIT_FAILURE /*implementation defined*/ 
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The EXIT_SUCCESS and EXIT_FAILURE macros expand into integral expressions that can be used as arguments to the std::exit function (and, therefore, as the values to return from the main function), and indicate program execution status.
| Constant | Explanation | 
  EXIT_SUCCESS
 | 
successful execution of a program | 
  EXIT_FAILURE
 | 
unsuccessful execution of a program | 
[edit] Notes
Both EXIT_SUCCESS and the value zero indicate successful program execution status (see std::exit), although it is not required that EXIT_SUCCESS equals zero.
[edit] See also
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C documentation for EXIT_SUCCESS, EXIT_FAILURE
 
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