C语言预处理命令

仙剑情缘发布时间：2020-08-09 14:17:02 ，浏览量：0

首先三种形式的命令：宏定义，文件包含，条件编译命令

宏定义主要是：#define，#undef

#define PI 3.1415926                   /*不带参数的宏定义*/
#define Max(a,b)  a>b?a:b              /*带参数的宏定义*/

下面举例说明定义宏FAILED用于检测数据的正确性。

①#define的应用：

#define FAILED(Status) ((Status)


    
        
        
        
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