Can You Add Qualifiers to the `main` Function Signature in C ?

Can Qualifiers Adorn "main"'s Signature in C ?

The standard dictates that "main" has two acceptable signatures:

• int main()
• int main(int, char*[])

However, a question arises: can the signature be modified to include qualifiers? For instance:

<code class="cpp">int main(const unsigned int, const char* const* argv);</code>

Answer:

According to the C 98 standard (section 3.6.1 paragraph 2), the implementation has the freedom to define the type of "main" beyond the mandatory return type of "int." This includes allowing the use of qualifiers. Therefore, while the standard does not explicitly mandate acceptance of an "env accepting" main, it is within the realm of permissibility.

Clarification:

The standard distinguishes between a standard environment and a freestanding environment. In a freestanding environment, the behavior of "main" is not subject to the standard but must be documented. Thus, the permissibility of qualifiers in "main"'s signature may vary in freestanding contexts.

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