java - java中的等式中的括号是否正确使用？

Question

double y = [(100-totalGrade)*weightCategory]+(totalGrade*x);

这是一个有效的方程式吗？主要是想知道括号是否使用正确

score 4 · Accepted Answer

No, the brackets are not used correctly. the square brackets ([ ]) are reserved for accessing array elements.

You want to use nested parenthesis:
double y = ((100-totalGrade)*weightCategory)+(totalGrade*x);

but in your equation, as alex pointed out:

double y = (100-totalGrade)*weightCategory+totalGrade*x;

is sufficient.

score 1 · Accepted Answer

[ and ] are not accepted in Java as the brackets you see in math, they are used to declare arrays. You must use ( and ) in their places.

score 1 · Accepted Answer

1

这就够了：

double y = (100-totalGrade)*weightCategory+totalGrade*x;

于 2013-02-12T16:58:08.890 回答

score 1 · Accepted Answer

不，如果您需要嵌套括号，您只需继续使用(and )，确保正确关闭每一对。

和字符用于下标运算符[，]例如在数组中，例如 main 方法的参数String[] args。

如果您遵循 BIDMAS/BODMAS 的规则，您会发现您的情况实际上不需要外括号。但是，如果您将来需要它们，请使用嵌套括号，如下所示：

int example = (1+2)*((3+4)*5);

4 回答 4