Here, we will learn about c programming macros, how to define and un define a macro, how and when macro expands?What is Macro?Macros are the names of text/ literal values/ string (constant values) or code fragm
Here, we are going to learn how to redefine a defined Macro in C programming language? To redefine a Macro, first we undefined the Macro and then define the Macro. By IncludeHelp Last updated : March 10, 2024 Redefining a Macro in C...
#definefun(x)x+1 #define,fun(x),x+1,or:#definefun(y)y+1 Ifthemacrocontentdefinedagainisdifferentwhenmultiple definitionsaremade,GCCwillgivethe"NAMEredefined" warningmessage Youshouldavoidredefiningthefunctionmacro,whetherinthe preprocessingcommandorintheCstatement,itisbetterto ...
[root@rockylinux tmp]# cat macro_define.c /** * 宏命定义的注意事项: * 1、带有参数的宏,参数使用时需要写在"()"之中,这样在宏展开时不会改变设计时的运算级别,保证结果正确;* 举例:#define MAX_INT(x,y) (x)>(y)?(x):(y) * 2、多行合并为一行(代码换行):当“宏定义”内容超过一行时...
使用宏#define:使用方便快捷,且有许多方法。但是不是类型安全的。 使用const:语法比较长,但是类型安全。 可以自行挑选。 补充内容 你可以使用#ifdef(#if defined) 或#ifndef(#if not defined) 来检查常量是否有被定义。 你可以使用#undef来解除对一个常量的定义。
This C tutorial explains how to use the #define preprocessor directive in the C language. In the C Programming Language, the #define directive allows the definition of macros within your source code.
宏的用法(macro in C) 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...
I started working with MCUs using Basic Stamps 2. My first programs where written in PBASIC. I enjoyed the simplicity of this language but soon moved on to C. One particular thing that I was missing in the C enviroment was the ability to define a pin at the begining of the program and...
Whereas the macros are defined by the #define keyword.2. Through inline function, the class’s data members can be accessed. Whereas macro can’t access the class’s data members.3. In the case of inline function, the program can be easily debugged. Whereas in the case of macros, the...
In a couple of days, I found that the Macro should be as following : // Delay Routine void RoutineDelayMCs(unsigned int interval) { #pragma ASM DJNZ R7, $ DJNZ R6, $-2 #pragma ENDASM } // Delay Macro -> Calculate interval to pass into Delay Routine #define MacroDelayMCs(interval...