These macros help prevent multiple inclusions of the same file, ensuring that its contents are included only once. File Inclusion Macrosįile inclusion macros are used to control the inclusion of header files in your C program. When you use SQUARE(5), the preprocessor replaces it with the expression ((5) * (5)), resulting in the value 25. In this example, the SQUARE macro takes an argument x and computes its square. Function-like macros provide a convenient way to express complex operations concisely.įunction-like macros in c example: #define SQUARE(x) ((x) * (x)) They take arguments, perform computations, and may even return values. Macro Function in Cįunction-like macros, as the name suggests, resemble actual functions. You can use it throughout your code, and the preprocessor will replace it with its defined value. Here, MAX_SIZE is an object-like macro representing the value 100. These macros are primarily used to define constants and abbreviations. They act as textual substitutions and do not take any arguments. Object-like macros are the simplest type of macros in C. Let’s explore the each type of macros in detail: Object-like Macros In C programming, macros come in different flavors, each serving a unique purpose.
#Macro definition in c code
Macros are powerful tools for code manipulation and creating shortcuts, while constants provide type safety and easier debugging.
It’s important to understand these distinctions to choose the most suitable option based on your programming needs. Macro values may occupy more memory space due to direct substitutionĬonstants consume memory as regular variables Yes, macros can take arguments and perform computationsĭifficult to debug due to direct text substitutionĮasy to debug as variables with fixed values
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