Question

How many types of macros are there?

(a) 1

(b) 2

(c) 3

(d) 4

The question was posed to me in my homework.

My query is from Preprocessing in portion Arduino Programming of Arduino

Answer 1

Correct answer is (b) 2

To explain: A macro is a constant variable that gets initialized in a program here with the help of a preprocessor. There are two types of macros, namely object type macros and function type macros. An object type macro is one which is simply a variable name with a value attached to it while a function type macro is one which is of the form of expression.