Home >Topic List >How to use define
How to use define
define usage: 1. Define constants; 2. Define function macros: 3. Define conditional compilation; 4. Define multi-line macros. For more information about the usage of define, you can read the article under this topic.
define usage of function macroThe usage of define function macro: 1. Define a simple calculation macro, "#define SQUARE(x) ((x) * (x))"; 2. Define a macro with multiple parameters, "#define MAX(a , b) ((a) > (b) ? (a) : (b))"; 3. Define macros with complex expressions, "#define ABS(x) ((x) < 0 ? -(x ) : (x))”.
defineHow to define multi-line macrosdefine defines a multi-line macro by using `\` to divide `do { \ printf("%d\n", x); \ } while (0)` into multiple lines for definition. In a macro definition, the backslash `\` must be the last character of the macro definition and cannot be followed by spaces or comments. When using `\` for line continuation, be careful to keep the code readable and make sure there is a `\` at the end of each line.
Related coursesMore>
C++ game project: Chinese chess development video tutorialIntermediate48622 plays
jQuery red and blue voting function practical tutorialAdvanced21883 plays
Selected fiddler packet capture tutorial - don’t do bad things after learningIntermediate50176 plays
Backend.com HTML5 video tutorialIntermediate78703 plays
Related Resource DownloadsMore>
Related TutorialsMore>
- 09-16
- 09-13
- 09-08
- 08-26
- 08-25
- 04-24