Which Preprocessor Is Used Define Macros?

The C preprocessor is a macro processor that is used automatically by the C compiler to transform your program before actual compilation. It is called a macro processor because it allows you to define macros, which are brief abbreviations for longer constructs.

Which directive is used to define a macro?

The #define directive is used to define values or macros that are used by the preprocessor to manipulate the program source code before it is compiled.

What is the use of macro preprocessor?

Macros allow you to write commonly used PL/I code in a way that hides implementation details and the data that is manipulated and exposes only the operations. In contrast with a generalized subroutine, macros allow generation of only the code that is needed for each individual use.