9.5.4 Conditional compilation directives The conditional compilation directives are used to conditio
9.5.1 Conditional compilation symbols The conditional compilation functionality provided by the #if,
Conditional Compilation Although debugging techniques can help you iron out problems in your code,
在编码的时候，有时候需要添加一些DEBUG信息，来为了方便调试程序，但是到了真正发布的时候，又不希望把这些信息进行编译发布。那么在以前C或者C++编码的时候，用IF/ENDIF来定义程序块实现这个功能
The ?: operator is called the conditional operator. It is at times also called the ternary operator
The && and || operators are called the conditional logical operators. They are also called
条件表达式实现了XQuery的分支功能，它的语法如下： if (expr1) then expr2 else expr3 if,then,else都是关键字。如果expr1的有效布尔值(Effec
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RFC182 Jeanne North NIC 7126 ARPA Network Information Center Category I.2 Stanford Research Institut
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