C ++ array [index]与index [array] [英] C++ array[index] vs index[array]

问题描述

可能重复:
在C数组中为什么如此? a [5] == 5 [a]

Possible Duplicate:
In C arrays why is this true? a[5] == 5[a]

array [index]和index [array]都可能是编译器功能或语言功能.第二个怎么可能?

Is the possibility of both array[index] and index[array] a compiler feature or a language feature. How is the second one possible?

推荐答案

编译器将关闭

index[array]

进入

*(index + array)

使用常规语法，它将变成

With the normal syntax it would turn

array[index]

进入

*(array + index)

，因此您将看到两个表达式的值均相同.这对于C和C ++都适用.

and thus you see that both expressions evaluate to the same value. This holds for both C and C++.

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