How to generate a newline in a cpp macro?

Question

How do I write a cpp macro which expands to include newlines?

Answer 1

Use the \ at the end of the line. I've seen a lot of C macos where they use a do...while(0)

#define foo() do \
{
  //code goes here \
  \
  \
}while(0);

Also, remember to use parenthases in many instances.

Example:

#define foo(x) a+b
//should be
#define foo(x) (a+b)