条件编译的概念;通常我们希望程序的其中一部分代码只有在满足一定的情况下才进行编译,否则不参与编译,(只有参与编译的代码最终才能被执行)

这就是条件编译;

基本用法;

#if condication01

...code01..

#elif condication02

...code02...

#else

...code03...

#endif

 #include<stdio.h>
#define MAX == 11
int main(int argc,const char *argv[],const char **env[]) {
#if MAX == 0
printf("MAX等于0");
#elif MAX > 0
printf("MAX大于0");
#else
printf("MAX小于0");
#endif
return ;
}

#if defined()和#if !defined()

aaarticlea/png;base64,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" alt="" />

#if defined(MAX) #if !defined()与

#ifdef(MAX) 和ifndef(MAX)一个意思;

aaarticlea/png;base64,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" alt="" />

【C语言】09条件编译的更多相关文章

  1. c语言中条件编译相关的预编译指令

    一. 内容概述 本文主要介绍c语言中条件编译相关的预编译指令,包括#define.#undef.#ifdef.#ifndef.#if.#elif.#else.#endif.defined. 二.条件编 ...

  2. C语言:条件编译

    假如现在要开发一个C语言程序,让它输出红色的文字,并且要求跨平台,在 Windows 和 Linux 下都能运行,怎么办呢?这个程序的难点在于,不同平台下控制文字颜色的代码不一样,我们必须要能够识别出 ...

  3. 关于C语言程序条件编译的简单使用方法

    #include <stdio.h> #include <stdlib.h> #define Mode //如果定义了Mode,那么就执行这个函数 #ifdef Mode vo ...

  4. 把《C语言接口与实现》读薄之第一章:引言

    1.1文学程序 文学程序(literate program):接口及其实现的代码与对其进行解释的正文交织在一起.文学程序由英文正文和带标签的程序代码块组成.例如, 〈compute x * y〉≡ s ...

  5. golang项目中使用条件编译

    golang项目中使用条件编译 C语言中的条件编译 golang中没有类似C语言中条件编译的写法,比如在C代码中可以使用如下语法做一些条件编译,结合宏定义来使用可以实现诸如按需编译release和de ...

  6. 条件编译#ifdef的妙用详解

    c语言中条件编译相关的预编译指令,包括  #define.#undef.#ifdef.#ifndef.#if.#elif.#else.#endif.defined. #define           ...

  7. JVM-程序编译与代码早期(编译期)优化

    早期(编译期)优化 一.Javac编译器 1.Javac的源代码与调试 Javac的源代码放在JDK_SRC_HOME/langtools/src/shares/classes/com/sun/too ...

  8. Windows7WithSP1/TeamFoundationServer2012update4/SQLServer2012

    [Info   @09:03:33.737] ====================================================================[Info   @ ...

  9. 深入理解Java虚拟机--下

    深入理解Java虚拟机--下 参考:https://www.zybuluo.com/jewes/note/57352 第10章 早期(编译期)优化 10.1 概述 Java语言的"编译期&q ...

随机推荐

  1. CTF-练习平台-Misc之 中国菜刀,不再web里?

    八.中国菜刀,不再web里? 下载文件后解压,是一个数据包,用wireshark打开,题中说的是菜刀,那就找http协议,首先过滤出http协议包 在第四个里面找到一句话木马 Flag应该在木马之后拿 ...

  2. 《DSP using MATLAB》Problem 4.18

    代码: %% ------------------------------------------------------------------------ %% Output Info about ...

  3. hdu2080-2081

    hdu2080 计算两点关于原点夹角,数学 #include<stdio.h> #include<math.h> double len(double x1,double y1, ...

  4. vector容器的用法以及动态数组

    vector容器不必去管大小 string申明的数组已经是动态的了 若是int类型的话,需要 cin>>N: int a[N]会出错 ,必须是int *p = new int[N] 然后再 ...

  5. stenciljs 学习十三 @stencil/router 组件使用说明

    @stencil/router 组件包含的子组件 stencil-router stencil-route-switch stencil-route stencil-route-link stenci ...

  6. 使用 php 7.3.0 官网的压缩包安装 FastAdmin

    使用 php 7.3.0 官网的压缩包安装 FastAdmin 直接从 php.net 官网下载了一 php7.3.0 的压缩包,解压到 c:/temp/php73 目录. 将 c:/temp/php ...

  7. 用Qstring给char[]数组赋值(转)

    tree_data.Desc  //Desc是char[80]类型的数据 Qstring newDescStr; strcpy(tree_data.Desc , newDescStr.toLocal8 ...

  8. URL中的hash(井号)

    1.#的含义 #代表网页中的一个位置,其右边的字符,就是该位置的标识符.比如 http://www.example.com/index.html#print 就是代表index.html中的print ...

  9. SQL Server Reporting Service 报错:报表服务器无法解密用于访问报表服务器数据库中的敏感数据或加密数据的对称密钥,必须还原备份密钥或删除所有加密的内容。

    出现这个问题,可以通过reporting services 配置管理工具来处理 首先,打开配置管理工具,连接. 在左侧的导航选项中选择Encryption Keys,将出现如图所示的界面,在右侧点击d ...

  10. R(6): 数据处理包dplyr

    dplyr包是Hadley Wickham的新作,主要用于数据清洗和整理,该包专注dataframe数据格式,从而大幅提高了数据处理速度,并且提供了与其它数据库的接口,本节学习dplyr包函数基本用法 ...