The function "A" is implemented in the C++ source file "A.cpp." It calls a function "B" which is implemented in the C++ source file "B.cpp".

The implementation of "B" starts out like this:

int B(int c) { ...

A programmer decides to create a file called "B.h" containing a declaration of the function "B".

Give the correct syntax for the declaration of "B":

The programmer plans to include a declaration of "B" in both "A.cpp" and "B.cpp".

Give the correct syntax for the line that will tell the compiler to include "B.h"