A macro is a fragment of code which has been given a name. Whenever the name is used, it is replaced by the contents of the macro. There are two kinds of macros: Object-like macros and function-like macros.

Inline function is a function that is expanded in line when the function is called. That is the compiler replaces the function call with the function code (similar to macros).

The disadvantage of using macros is that the usual error checking does not occur during compilation..