c++ - max 函数的奇怪行为

Question

我有这个代码:

largestDeviation = max(max(max(angleBetweenVectors(robustNormal, normalAtA),
                               angleBetweenVectors(robustNormal, normalAtB)),
                           angleBetweenVectors(robustNormal, normalAtC)),
                       angleBetweenVectors(robustNormal, normalAtD)),
                       angleBetweenVectors(robustNormal, normalAtE);

方法:angleBetweenVectors 返回一个float。

我看不到这段代码在做什么，也看不到它为什么要构建，括号没有正确匹配，我担心它会导致错误。我怎样才能获得对 angleBetweenVectors 的所有调用的最大值？

Answer 1

添加一些索引，你会得到:

largestDeviation = 
max(
   max(
      max(
         angleBetweenVectors(robustNormal, normalAtA),
         angleBetweenVectors(robustNormal, normalAtB)
      ),
      angleBetweenVectors(robustNormal, normalAtC)
   ),
   angleBetweenVectors(robustNormal, normalAtD)
), 
angleBetweenVectors(robustNormal, normalAtE);

即它将返回 angleBetweenVectors(robustNormal, normalAtE); 的值，因为您缺少 max