试图使用堆栈查看预期的输出

Question

我编写了一个解析给定输入的代码。我一直试图修复它大约三个小时。但我无法获得预期的产出。但是，我是堆栈使用和Java的新手。有人能帮我吗？ from collections import defaultdict sumdict = defaultdict(float) for name, num, val in mylist: sumdict[name, num] += float(val.replace(',', '.')) # Side-note: I'd have used tuple/namedtuple for the triples here since the data likely # shouldn't be mutable, and tuples are the "proper" type for fixed length, # heterogeneous, immutable data, but the functional difference is minimal summed = [[name, num, valsum] for (name, num), valsum in sorted(sumdict.items())]

预期产出：

Issue is fixed.

Answer 1

在while (!stackCopy.Pop().Equals("(")) "("之前您有2个令牌，因此idCon.Push("EXPI");被调用了两次。结果条件if (temp.Equals("EXPI"))被满足两次，并且"EXPI"被打印在最后一行。