How do I write a recursive for-loop “repeat” macro to generate C code with the CPP preprocessor?

Vesa Karvonen's "Order" library/language can definitely do this for you. It implements unrestricted recursion and looping in the C preprocessor, and as a really cool bonus dresses it up with the nice concise syntax of a "proper" programming language (to clarify: this is not an alternative preprocessor, it just does a lot of token-pasting to keep its keywords short. It is still pure CPP).

With help from the answers here (and studying P99, Chaos, Order, and Cloak) I think I have a reasonably simple and compact proof-of-concept(1). Since I wanted only "repeat" functionality rather than a full blown interpreter, I went with a somewhat different approach than those other solutions. Instead of creating generic "if", "while", or "when" macros, I instead directly used a series of "decrement" macros that expand to the desired macro plus a call to the macro for n-1.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.