Can `main` Arguments in C++ Be Modified with `unsigned` and `const`?
Published on 2024-11-10
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Customizing the Arguments of main in C
The default signatures for main in C are well-known: int main() and int main(int, char*[]). However, a question arises:
Can main's arguments be modified with qualifiers like unsigned and const?
My tests indicate yes, but concerns remain about potential overloading or violation of C standards.
According to the C 98 standard (section 3.6.1 paragraph 2), overloading main is prohibited. The standard explicitly states that main must have a return type of int, but its other aspects are implementation-defined.
Notably, the standard does not forbid the use of arguments with qualifiers like unsigned and const. While it is not mandated by the standard, it is permissible for implementations to accept these modifications.
Freestanding environments, where startup and termination behaviors are implementation-defined, are exempt from these rules and documentation may detail specific behaviors.
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