EXIT_SUCCESS, EXIT_FAILURE

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.

[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.

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.

[edit] Example

#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;
}

The quick brown fox jumps over the lazy cat

[edit] See also

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