Can you modify the `main` function's arguments with qualifiers like `unsigned` and `const` in C ?

Can Unsigned and Const Qualifiers Be Used in C 's main Function Arguments?

The C standard explicitly defines two valid signatures for the main function:

• int main()
• int main(int, char*[])

However, the question arises: can these signatures be modified to include qualifiers such as unsigned and const?

Analysis:

The C 98 standard states that the main function cannot be overloaded and must return an integer (int) type. While it does not explicitly address the use of qualifiers in the arguments, it permits implementations to define additional behaviors beyond the standard.

Conclusion:

According to the standard, the following signature is legal and should be accepted by conforming compilers:

int main(const unsigned int, const char* const* argv);

This is because the standard allows for additional signatures to be defined by implementations, as long as the return type remains int.

Additional Information:

It's important to note that while the C standard defines the two mentioned signatures as valid, it does not require implementations to support them. In freestanding environments, startup and termination behavior are implementation-defined, and the standard exempts these environments from any requirements beyond documenting their behavior.

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