Macro Arguments Evaluation in C: Here, we will learn how Macro arguments evaluate in C programming language? By IncludeHelp Last updated : March 10, 2024 We can define a function like Macro, in which we can pass the arguments. When a Macro is called, the Macro body expands or we can ...
In Exapmle2.c, MAX is a macro. From the output, we observe that MAX is replaced by its value 200. 2. Function-like macros: Syntax: #define macro_name() macro_value macro_name is a user-defined name of the macro. Pair of parenthesis has to put after the macro_name. No space is...
我们可以使用宏去定义常量,当然我们也可以利用宏定义中运算 #include <stdafx.h> #include <stdio.h> #include <conio.h> #include <stdlib.h> #include <string.h> #define MULTIPLY(val1, val2)((val1)*(val2)) //这里定义了一个乘法运算的宏 void main() { int result; result = MULTIPLY (2,...
used to declare multiple discriminant criteria in a single statement: #if defined (VAX) and defined (UNIX) and defined (DEBUG)! Unlike #if, #elif, and #else, macros for #indef, #ifndef, and defined tests can be either object macros or function macros. The use of the -Wundef...
宏(Macro)本质上就是代码片段,通过别名来使用。在编译前的预处理中,宏会被替换为真实所指代的代码片段,即下图中 Preprocessor 处理的部分。 C/C++ 代码编译过程 图片来自 ntu.edu.sg 根据用法的不同,分两种,Object like 和 Function like。前者用
Voeg in het tekstbestand de volgende regels code toe: Attribute VB_Name = "KbTest" ' Your Microsoft Visual Basic for Applications macro function takes 1 ' parameter, the sheet object that you are going to fill. Public Sub DoKbTest(oSheetToFill As Object) ...
which can be set up to automate the printing of a worksheet, filtering data, or calculating numbers. In general, a Form control button and an ActiveX control command button are similar in appearance and function. However, they do have a few differences, which are explained in the following...
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Macros巨集 巨集為一組文字或數字的縮寫例如我可以用indvar來代表所有自變項，convar來代表固定控制變項regressyx1x2x3sexageeduc regressy`indvar’`convar’兩種Macros巨集 local •只在dofile內有效 global •直到關閉stata前都有效 LocalMacros的語法 locallocal-name“string”•定義文字巨...
__VA_ARGS__ 只能用于function-like macro。这个__VA_ARGS__是可变参数的宏,是新的C99规范中新增的。不管你写成#define ABC __VA_ARGS__还是#define ABC #__VA_ARGS__又还是#define ABC() __VA_ARGS__GCC都会丢给你一个warning:warning: __VA_ARGS__ can only appear in the expansion of a C99...