Function prototype declared inside main - best practice?

Question

Is this a good style to have the function prototype declared inside of the main function?

I was looking at a C tutorial, I think is quite out of date. However, they

Answer 1

It's not a good style.

Either declare the local function prototypes at the beginning or move them to a header-file.

Function protoypes (and external variables as well) can be declared almost everywhere in the c-language. However, just because it's possible shouldn't be no reason to write spaghetti style C.

It makes the code less readable. For me such practices are a clear sign of code-smell.