Is the following a standard C function declaration according to ISO/IEC 9899:2017 (c17)? int foo(int (bar), int (baz)); If so, please point me to the section in the standard that defines this. In ...

Does the definition int a = 0, b = a++, c = a++; have defined behavior in C? Or almost equivalently, does the comma in an object definition introduce a sequence point as for the comma operator in e...

So I was re-reading C17 6.5/6 - 6.5/7 regarding effective type and strict aliasing, but couldn't figure out how to treat qualifiers. Some things confuse me: I always assumed that qualifiers aren't...

The fact that a struct with a flexible array member is a type with which a variable can be declared and to which sizeof can be applied leads to an unusual behavior in the following program. file fa...

If the next representable value after -0.0 is +0.0, then why nextafter(-0.0, INFINITY) does not return +0.0?

Is there any C compiler able to detect* the violation of a "strictly conforming program"? * under some option, for example, --accept-only-strictly-conforming-program If no, then whi...

In the late draft of C11 [C11_N1570] and C17 [C17_N2176] I fail to find the proof of the following (which, I believe, is commonly known): sizeof(short) <= sizeof(int) <= sizeof(long) <= si...

I am quite surprised that C does not guarantee that certain (constant) expressions are evaluated at compile (translation) time. C11 (6.6 Constant expressions) (emphasis added): A constant expressi...

Why not all the standard headers are preceded with std prefix? I.e. why complex.h and not stdcomplex.h?

The following code attempts to use array indexing on a string literal in two different constant contexts: static char x = "abcx"[3]; _Static_assert ("abcx"[3] == 'x', "..."); Judging by Compile...

In C++ it's recommended to use lock_guard as it ensures when the object is destroyed it unlocks the mutex. Is there a way to implement the same thing in C? Or do we have to just implement it manua...

After stumbling across the question "Why are these constructs using pre and post-increment undefined behavior?" today I decided to grab the newest draft for the next C standard I could find and rea...

As I was checking news about GCC 8, I saw that they added support for the 2017 version of the C language (not C++17, really C17). But I can't find any information about it on Internet. Is it a new...

Are there any Proposals (or plans) to the C language Standard to change the (last sentence of the) description of the snprintf function such that the ambiguity described in this my answer to the qu...