Question

I have this been given C code where the heading statement includes the following:

#define, EQ(a, b) ((a) == (b))

What does it mean?

Answer 1

The comma is an error that will prevent the code from compiling: I’ll assume that it’s a typo.

Given:

#define EQ(a, b) ((a) == (b))

This defines a macro for the equality operator ==.

Using this macro later in the code, you can type, e.g.:

if (EQ(2+2, 4))

instead of:

if (2+2 == 4)

Not very useful, really.