EXIT_SUCCESS, EXIT_FAILURE
From cppreference.com
| 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 constant 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.
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A freestanding implementation is required to provide |
(since C++23) |
| Constant | Description |
EXIT_SUCCESS
|
successful execution of a program |
EXIT_FAILURE
|
unsuccessful execution of a program |
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.
Although EXIT_SUCCESS and EXIT_FAILURE are required to be freestanding since C++23, they are not required to be available in a freestanding C implementation.
Example
Run this code
#include <cstdlib>
#include <iostream>
int main(int argc, char* argv[])
{
if (argc <= 1)
{
std::cout << "At least one command-line argument required\n";
return EXIT_FAILURE;
}
std::cout << argv[1] << '\n';
return EXIT_SUCCESS;
}
Possible output:
The quick brown fox jumps over the lazy cat
See also
C documentation for EXIT_SUCCESS, EXIT_FAILURE
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