What is meant by the term concatenation?

What is meant by the term concatenation?

1 : a group of things linked together or occurring together in a way that produces a particular result or effect an unusual concatenation of circumstances George McGovern was the beneficiary, in 1972, of a unique concatenation of party reform and political accident.—

What is macro concatenation in C?

3.5 Concatenation When a macro is expanded, the two tokens on either side of each ‘ ## ‘ operator are combined into a single token, which then replaces the ‘ ## ‘ and the two original tokens in the macro expansion. Usually both will be identifiers, or one will be an identifier and the other a preprocessing number.

What is concatenation of macro parameters?

4.2.1 Concatenation of Macro. Parameters. □ Allow parameters to be concatenated with. other character strings. □ Suppose the parameter is named &ID, the.

What is a concatenation in computing?

Concatenation, in the context of programming, is the operation of joining two strings together. The term”concatenation” literally means to merge two things together. Also known as string concatenation.

What does == mean in C programming?

== is an Equal To Operator in C and C++ only, It is Binary Operator which operates on two operands. == compares value of left and side expressions, return 1 if they are equal other will it will return 0.

What are different features of macro?

Macros have two parts: a macro definition, which indicates the beginning and end of the macro and gives a name to the macro, and a macro body, which contains regular commands or macro commands that build command syntax. When a macro is invoked by the macro call, syntax is generated in a process called macro expansion.

How many parameters can a macro have?

There are two types of macro parameters: positional and keyword.

What is concatenation give an example?

The concatenation of two or more numbers is the number formed by concatenating their numerals. For example, the concatenation of 1, 234, and 5678 is 12345678.

How to concatenate the contents of a string?

The functions described in this section concatenate the contents of a string or wide string to another. They follow the string-copying functions in their conventions. See Copying Strings and Arrays . ‘ strcat ’ is declared in the header file string.h while ‘ wcscat ’ is declared in wchar.h .

How is string concatenation done at the language level?

Technically string concatenation is done at the language level. – Martin York Mar 10 ’11 at 6:59 The preprocessor does no such thing. It’s the C language proper that treats adjacent string literals as if they were a single string literal. – Jim Balter Mar 10 ’11 at 7:00

Can a preprocessor automatically concatenate two strings?

3 Answers 3. If they’re both strings you can just do: The preprocessor automatically concatenates adjacent strings. EDIT: As noted below, it’s not the preprocessor but the compiler that does the concatenation. Technically string concatenation is done at the language level. The preprocessor does no such thing.

When do you use Token Pasting in concatenation?

Token pasting is most useful when one or both of the tokens comes from a macro argument. If either of the tokens next to an ‘ ## ’ is a parameter name, it is replaced by its actual argument before ‘ ## ’ executes. As with stringizing, the actual argument is not macro-expanded first.