What projects cannot be done in C?

Question

I would like to know what projects cannot be done in C.

I know programming can be quicker and more intuitive in other languages. But I would like to know what features are missing in C that would prevent a project from being completed well.

For example, very few web-frameworks exist in C.

Answer 1

C, like many other languages, is Turing Complete.

So simple answer is: none.

However, C++ Template Meta Programming meets the same criterion, so "it is possible" is not a good criterion to choose tools.

Answer 2

The very first C compiler?