static_cast🔷允许执行任意的隐式转换和相反转换 🔷没有运行时类型检查来保证转换的安全性 🔷进行上行转换（把派生类的指针或引用转换成基类表示）是安全的 🔷进行下行转换（把基类的指针或引用转换为派生类表示），由于没有动态类型检

LeetCode 876. Middle of the Linked ListLeetCode-876 Given a non-empty, singly linked list with head node head, return a

LeetCode 739. Daily TemperaturesLeetCode-739 Given a list of daily temperatures temperatures, return a list such that, f

LeetCode 237. Delete Node in a Linked ListLeetCode-237 Write a function to delete a node in a singly-linked list. You wi

LeetCode 461. Hamming DistanceLeetCode-461 The Hamming distance between two integers is the number of positions at which

LeetCode 344. Reverse StringLeetCode-344 Write a function that reverses a string. The input string is given as an array

LeetCode 191. Number of 1 BitsLeetCode-191 Write a function that takes an unsigned integer and returns the number of 

LeetCode 27. Remove ElementLeetCode-27 Given an integer array nums and an integer val, remove all occurrences of val in

剑指 Offer 05. 替换空格请实现一个函数，把字符串 s 中的每个空格替换成"%20"。 method 1: 模拟string replaceSpace(string s) { string t;

除法与取模的符号除法：符号相同商为正，否则为负取模：符号与被取模数相同。m % n的结果符号与m相同

LeetCode 9. Palindrome NumberLeetCode-9 Given an integer x, return true if x is palindrome integer. An integer is a pali

LeetCode 69. Sqrt xLeetCode-69 Given a non-negative integer x, compute and return the square root of x. Since the return