... 基本表达式(primary expression) 常量表达式(constant expression) 后缀表达式(postfix expression) ...
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Constant expression required 要求常量表达式 ; 需要常量表达式 ; 请求常量表达式
Constant expression expected 要求常量表达式
constant-expression 常量表达式
Implicit Constant Expression Conversions 隐式常量表达式转换
integer constant expression 整数常数表示
integral constant expression 整型常量表达式
Constant Expression Function 常表达式函数
compile-time constant expression 常量表达式
character constant expression [计] 字符常数表达式
If the expression can be verified as a constant, then a constant expression (which is available for optimization) is used.
如果发现表达式是常量,那么就使用可以优化的常量表达式。
Extract constant is similar to Extract Local Variable, but you must select a static, constant expression, which the refactoring will convert to a static final constant.
Extract Constant与Extract Local Variable相似,但是您必须选择静态常量表达式,重构工具将会把它转换成静态的final常量。
So we have to use an integral constant expression.
所以我们要使用整型常量表达式。
And we can simplify this expression as saying negative e squared over 4 pi, epsilon nought r squared. Epsilon nought is a constant, it's something you might see in physics as well.
也会遇到它,在这里,你可以就把它,理解为一个转换系数,我们需要做的。
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