CC 语法#define directive #define directive 预处理器支持文本宏替换和类似功能的文本宏替换。 句法 #define identifier replacement-list(optional) (1) #define identifier( parameters ) replacement-list (2) #define identifier( parameters, ... ) replacement-list (3) (since C99) #define ...
The latest version of this topic can be found at #define Directive (C/C++). The #define creates a macro, which is the association of an identifier or parameterized identifier with a token string. After the macro is defined, the compiler can substitute the token string for each occurrence ...
You can use the #define directive to give a meaningful name to a constant in your program. The two forms of the syntax are:Syntax#defineidentifiertoken-stringopt#defineidentifier(identifieropt,...,identifieropt)token-stringoptRemarksThe #define directive substitutes token-string for all subsequent ...
1、Definition:The #define DirectiveYou can use the #define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax#define identifier token-stringopt#define identifier( identifieropt, . , identifieropt ) token-stringoptUsage:1. 简单的define...
All instances of theidentifierparameter that occur after the#definedirective in the source file constitute a macro call, and the identifier will be replaced by a version of thetoken-stringparameter that has actual arguments substituted for formal parameters. The number of parameters in the call must...
You can use the #define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax #define identifier token-stringopt #define identifier[( identifieropt, ... , identifieropt )] token-stringopt ...
The #define Directive You can use the #define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax #define identifier token-stringopt #define identifier[( identifieropt, ... , identifieropt )] token-stringopt...
You can use the #define directive to give a meaningful name to a constant in your program. The two forms of the syntax are: Syntax #define identifier token-stringopt #define identifier[( identifieropt, ... , identifieropt )] token-stringopt ...
The "define" in C language is a preprocessor directive that is used to define a constant or a macro. It allows the programmer to give a name to a value or an expression, which can then be used throughout the program. The defined constant or macro is replaced by its value during the ...
The #define directive cannot be used to declare constant values as is typically done in C and C++. Constants in C# are best defined as static members of a class or struct. If you have several such constants, consider creating a separate "Constants" class to hold them. ...