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环形链表-找环点leetcode： 141-环形链表判断是否有环/** * Definition for singly-linked list. * struct ListNode { * int val; * struct ListNode *next; * }; */bool hasCycle(struct ListNode *head) { str...

/* 中缀表达式转换为逆波兰表达式（后缀表达式） */#define STACK_SIZE 10typedef struct STACK{ char *base; char *top; int stack_size;}rpn_stack;rpn_stack *init_stack() { rpn_stack *my_stack = (rpn_stack *)calloc(1,siz...

入门解释：http://www.cnblogs.com/xzxl/p/7226557.html进阶解释：http://www.cnblogs.com/xzxl/p/7341536.html入门篇模板#define ARR_SIZE 100int pre[ARR_SIZE];int deep[ARR_SIZE];void init() { int i = 0; for (i = ...