由于这个问题,涉及了很多知识,例如数据结构里面的哈希表,c++中的迭代器,因此,需要对于每一个疑惑逐一击破. 问题描述 You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'. The wheels can rotate freely and wrap around: for example w…