三元（条件）运算符用C [英] The ternary (conditional) operator in C

问题描述

什么是需要条件运算符？在功能上是多余的，因为它实现了一个if-else结构。如果条件运算符是比同等的if-else分配更有效率，为什么不能的if-else是由编译器更有效地PTED间$ P $？

What is the need for the conditional operator? Functionally it is redundant, since it implements an if-else construct. If the conditional operator is more efficient than the equivalent if-else assignment, why can't if-else be interpreted more efficiently by the compiler?

推荐答案

三元运算符是一个语法和可读性的方便，而不是绩效快捷方式。人们都在它的优点分割为不同复杂程度的条件语句，但对于短的条件下，它可以是有一个一行前pression有用

The ternary operator is a syntactic and readability convenience, not a performance shortcut. People are split on the merits of it for conditionals of varying complexity, but for short conditions, it can be useful to have a one-line expression.

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