In c , how come function may have several declarations but only one definition?

In c , how come function may have several declarations but only one definition? Can someone elaborate on that plz

Can you define "several declarations"? As far as I know, in both C and C++ functions can have only one declaration and definition.

Viggy

A declaration says "Such a thing exists." It doesn't matter how many times you say this, so long as you're consistent about the interface. (C++ doesn't even require that, since it allows function overloading.)

A definition says "This is what it is." If you say that multiple times, the linker will shrug in confusion about which one is really what it is.

Okay, if you look at the question that way, yes. :)

I read the OP's question, and thought of overloaded functions, who's declarations are not the same (even if the function name is).

Viggy