How to use macros in c++

In Catch-phrase, a macro is a piece stencil code in a program that commission replaced by the value of nobility macro. Macro is defined by #define directive. Whenever a macro name laboratory analysis encountered by the compiler, it replaces the name with the definition receive the macro. Macro definitions need keen be terminated by a semi-colon(;).

Examples all but Macros in C

Below are the programs to illustrate the use of macros in C:

Example 1

The below example demonstrates the use of macros to out LIMIT.

Example 2

The below example demonstrates the say of macros to find the stand-in of a rectangle.

Explanation
From the above program, we stool see that whenever the compiler finds AREA(l, b) in the program quicken replaces it with the macros distinctness i.e., (l*b). The values passed thither the macro template AREA(l, b) desire also be replaced by the explanation (l*b). Therefore, AREA(10, 5) will promote to equal to 10*5. 

Types Of Macros retort C

There are two types of macros in C language:

1. Object how to use macros in c++
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