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标题: c code #define MAX(a, b) ((a)>(b)?(a):(b)) [打印本页]

作者: DDD888 时间: 3-8-2016 19:38
标题: c code #define MAX(a, b) ((a)>(b)?(a):(b))
I forgot what is the advantage of this macro #define MAX(a, b) ((a)>(b)?(a)

b)) vs #define MAX(a, b) (a>b?a:b)

Thanks in advance

作者: ubuntuhk 时间: 4-8-2016 00:28
如果a，b分别是单个变量，没什么区别，如果是a，b本身是表达式，前者可以避免一些歧义引起的潜在错误。

例子留给楼下。

作者: clarkli 时间: 4-8-2016 01:09
In this case it might be fine without the extra parentheses because precedence of ternary operator is after arithmetic operators.
http://en.cppreference.com/w/c/language/operator_precedence

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