How do you name a macro in C++?

How do you name a macro in C++?

Macro names should only consist of alphanumeric characters and underscores, i.e. ‘a-z’ , ‘A-Z’ , ‘0-9’ , and ‘_’ , and the first character should not be a digit.

How do you declare a macro in C++?

C++ Preprocessor

1. Function-Like Macros. You can use #define to define a macro which will take argument as follows −
2. The # and ## Operators. The # and ## preprocessor operators are available in C++ and ANSI/ISO C.
3. Predefined C++ Macros. C++ provides a number of predefined macros mentioned below −

What does Error macro mean?

The Macro Error message appears when there is an error in the macro that you were running. The specified method cannot be used on the specified object for one of the following reasons: An argument contains a value that is not valid.

How do you name a macro?

To do this, follow these steps:

1. Press Alt+F8 to display the Macros dialog box.
2. From the list of macros displayed, select the one you want to rename.
3. Click on Edit.
4. At the top of the macro is the keyword “Sub” followed by the macro name, then a pair of parentheses.

What is the rule for naming macro names Class 10?

You must use a letter as the first character. You can’t use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name. Name can’t exceed 255 characters in length.

What is ## macro C++?

The double-number-sign or token-pasting operator (##), which is sometimes called the merging or combining operator, is used in both object-like and function-like macros. It permits separate tokens to be joined into a single token, and therefore, can’t be the first or last token in the macro definition.

What is macro in C++ with example?

Macros: Macros are a piece of code in a program which is given some name. Whenever this name is encountered by the compiler the compiler replaces the name with the actual piece of code. The ‘#define’ directive is used to define a macro.

How do I fix macros?

Edit the macro

1. On the Developer tab, in the Code group, click Macros.
2. In the Macro name box, click the macro that you want to edit.
3. Click Edit. The Visual Basic Editor appears.

How do I rename a macro module?

Steps for renaming an Excel Macro Module:

1. Highlight the desired module by clicking it once.
2. Go to the box/window right below where the modules are visible. This is called the “Poperties” window.
3. Click in the box next to where it says “(Name)” and rename the module.

What are the rules for the naming of library module and macro names?

Use a letter as the first character. (Names aren’t case sensitive, but they preserve capitalization.)

Use only alphanumeric characters and the underscore character ( _ ).

Use fewer than 255 characters.

Avoid names that match Visual Basic or Reflection commands.

Give unique names to macros within a single module.

Which of the following is invalid macro name?

Macro names should only consist of alphanumeric characters and underscores, i.e. ‘a-z’, ‘A-Z’, ‘0-9’, and ‘_’, and the first character should not be a digit.