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First, and only for the constructor of the most derived class as described below, virtual base classes shall be initialized in the order they appear on a depth-first left-to-right traversal of the directed acyclic graph of base classes, where “left-to-right” is the order of appearance of the base cl 阅读全文
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c++ 中的 mutable 关键字是什么意思？mutable is for the case where an object islogicallyconstant, but in practice needs to change.class Employee {public: Employee(const std::string & name) : _name(name), _access_count(0) { } void set_name(const std::string & name) { _name = name; } std... 阅读全文
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Given constant integers x and t, write a function that takes no argument and returns true if the function has been called x number of times in last t secs.Q: 题意很明确，实现一个函数，如果该函数在过去的t秒内，被call了x次，则返回trueA:1. 对一个queue包装一下，其size只有x2. 每次call 这个函数的时候，检查queue是否的size==x，如果满了，pop第一个，再添加。每次添加当时的时间到queue中3. 函数返 阅读全文