二元或一元运算符 [英] binary or unary operator

问题描述

嗨世界。我有个问题。运算符[]二元还是一元？请告诉我为什么它是一元的或为什么它是二元的？

谢谢

hi world. i have a question. is the operator [] binary or unary? and please tell me why it is unary or why it is binary?
thanks

推荐答案

它被称为订阅运营商 [ ^ ]这是二元运算符的一个特例，它需要左侧的可索引值和索引值。



但它实际上也不是：它是一种语法糖而是语言的一部分，而不是一个真正的操作员。

你可以超载它虽然： http://www.learncpp.com/cpp-tutorial/98- overloading-the-subscript-operator / [ ^ ]

It's called the Subscript operator[^] and it's a special case of a binary operator in that it requires an indexable value on teh left and a indexing value as well.

But it isn't really either: it's a "syntactic sugar" and part of the language instead of being a "real" operator.
You can overload it though: http://www.learncpp.com/cpp-tutorial/98-overloading-the-subscript-operator/[^]

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