![]() To define a macro in C language, use the #define directive followed by the name and definition of the macro. Object-like macros define constants or code snippets, while function-like macros define code snippets with arguments.Ĥ: How do I define and use macros in C language? The two types of macros in C language are object-like macros and function-like macros. They also make it easier to modify and update code by changing the definition of a macro.ģ: What are the two types of macros in C language? The benefits of using macros in C language include improved code readability and maintainability by allowing developers to define and reuse code snippets, constants, and functions. They are identified by the # symbol at the beginning of a line.Ģ: What are the benefits of using macros in C language? Macros in C language are preprocessor directives that are used to define constants, functions, and code snippets. They help save a lot of time and make coding an efficient process. ![]() They are declared using #define directive and are of many types that are Object-like Macro, Function-like Macro, Multi-line Macro and Chain Macro. A macro is replaced by a piece of code in our program during compilation. In this article, we have seen what macros are in C programming and how they are useful. In the example below, we have declared the array elements in multiple lines using backslashes which makes it a multi-line macro. Printf("Cube of %d is %d\n", a, CUBE(a)) Īs the name suggests, multi-line macros are declared in multiple lines using a backslash. In the code below, 5 is a constant, and whenever we use MAX, it will denote 5. It is a simple macro that gets replaced with some numeric value represented as a constant. We do not need to use a semicolon to terminate C macro functions. They do not utilize any memory and are different from other variables in the code. It is good practice to declare macros in upper-case alphabets in order to distinguish them from other identifiers. We use the #define preprocessor directive to include C macro functions and objects in our code. We can say that macro is a code or a set of statements that gets replaced by its value during compilation time. In order to avoid writing that code many times and save our time, we use macros in C programming. Sometimes when we are programming a large project we generally write our code and then compile it using a compiler and generally there are some numbers or pieces of code that are repeated many times in the code. So, Let's start with trying to understand what macros are in C. In this article, We will discuss what macros are in c and what are its different types. ![]()
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