Question

Scope of macro definition

• A. cannot be beyond the file in which it is defined
• B. may be part of a file
• C. is in the entire program
• D. a, b, c

Answer 1

The correct option is D a, b, c

Scope of macro definition:-

Preprocessor symbols most definitely have a scope, but that scope does not interact with the other scopes such as file scope. Preprocessor symbol scope is confined to a single translation unit.

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. Object-like macros resemble data objects when used, function-like macros resemble function calls. We may define any valid identifier as a macro, even if it is a C keyword.

Macroscan be used to make tasks less repetitive by representing a complicated sequence of keystrokes, mouse movements, commands, or other types of input. In computer programming, macros are a tool which allows a developer to re-use code.