[mhh__]

> If you call a function and it doesn't exist, it won't get auto-generated for you on the fly.

People want these features and the end up making them (badly) using Macros. Also, as to "a + b", it's either trivial enough to be inlined immediately by the compiler or obvious enough that it's your fault.

> If you call a function and it doesn't exist, it won't get auto-generated for you on the fly

As opposed to you writing the function manually every time and then it guaranteeing your binary gets cluttered?

C is also not portable assembler as some people claim, modern compilers are way to complicated for it to be that simple (unless you're working on microcontrollers)