1) #if defined XXX_XXX #endif 是条件编译,是根据你是否定义了XXX_XXX这个宏,而使用不同的代码。 一般.h文件里最外层的 #if !defined XXX_XXX #define XXX_XXX #endif 是为了避免.h头文件被重复include。 2) #error XXXX 是用来产生编译时错误信息XXXX的,一般用在预处理...
Why is '-ed' sometimes pronounced at the end of a word? What's the difference between 'fascism' and 'socialism'? Popular in Wordplay See All More Words with Remarkable Origins Terroir, Oenophile, & Magnum: Ten Words About Wine 8 Words for Lesser-Known Musical Instruments ...
illdefined problem ilo international lab ilo conventions ilo international lab ilocos sur province iloilo city ilona and gordon andr ilona slupianek ilopango lake ilpaizgdhvy ilu institute of lond ilya konovalov ilya rashap im cctld im - agery im armstrong im auftrag verkaufen im exposed im fine...
if fulfil if have no if he be poor and not if he becomes a star if he betrays you twi if he gets lost if he refused if i aint got you fea if i am seriousbr if i come all the way if i could find the w if i could stop the m if i could take you t if i could try it...
DEFINED:如果给定的变量(普通变量、缓存变量、环境变量)存在,则返回真。格式为:if(DEFINED <name>|CACHE{<name>}|ENV{<name>}),注意缓存变量前要加CACHE,环境变量前要加ENV。 3. 二元测试命令,二元操作符有的左边和右边需要提供变量: EQUAL:左边两个字符串或者变量相等时为真。格式为:if(<variable|string> ...
i这是for循环中的变量 if not define %%i set %%i=s 如果%%i中的值不是已经定义的变量的话,将其值作为变量名,该变量的值为s 如有test.txt文件,内容为 a b c 则 for %%i in (test.txt) do if not defined %%i set %%i=s 将生成三个变量 a=s, b=s, c=s ...
[translate] awhich are then allotted credited as fully paid to the persons entitled or as they may direct . 那然后被分配相信如完全向人付款名为或当他们指引。 [translate] acapitalized terms are defined in the Plan if not defined herein 大写的期限在如果不此中被定义的计划被定义 [translate] ...
if defined num echo num 已经被定义了 if not defined var echo var 没有被定义 pause 执行结果: str 已经被定义了 num 已经被定义了 var 没有被定义 请按任意键继续. . . 5、else 使用的注意事项 ELSE 子句必须出现在同一行上的 IF 之后。例如: ...
\neg,NOT。真值表如下: 析取(disjunction) \vee,OR。真值表如下: 合取(conjunctive) \wedge,AND。真值表如下: 实质蕴涵(material conditional) \Rightarrow,ONLY IF。真值表如下: 如果已知p\Rightarrow q为真,那么仅当q为真时,p才能为真。 双条件(biconditional) ...
Asthma drugs are not addictive and you don't need to keep increasing the dose. If anything, the reverse is true. 哮喘药物不会造成药物依赖,你不用持续增大剂量。甚至正相反,减小剂量才对。 柯林斯高阶英语词典 Living together didn't harm our friendship. If anything it strengthened it... 在一起...