Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers,+,-,*,/operators and empty spaces. The integer division should truncate toward zero. You may assume that the given expression is always valid. Some examples: "3+2*2" ...
vector<string> ans_vector_post;// 存放后缀表达式string post_string;// 存放后缀表达式};inlineintprior(charop){// 计算优先级函数if(op =='+'|| op =='-') {return1; }elseif(op =='*'|| op =='/'|| op =='%') {return2; }else{return0; } }longlongintstring_to_int(string in)...
个人博客:http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/basic-calculator-ii/description/ 题目描述: Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer...
Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer division should truncate toward zero. Example 1: Input: "3+2*2" Output: 7 1. 2. Example 2: Input: " 3/...
Tags: LeetCode, Python, Programming, Solution, Hard, Algorithm Slug: leetcode-765 Author: ouankou LeetCode 第772题 Basic Calculator III 简要分析及Python代码 题目: Implement a basic calculator to evaluate a simple expression string. The expression string may contain open and closing parentheses , ...
int val = 0; //8+42-1+3-2 string[] jia = s.Split(new string[] { "+" }, StringSplitOptions.RemoveEmptyEntries); for (int i = 0; i < jia.Length; i++) { string[] jian = jia[i].Split(new string[] { "-" }, StringSplitOptions.RemoveEmptyEntries); int[] jianint = new...
basic_cal.png /** * By utilizing a doubly linked list... */typedefstructNodeStruct{intval;structNodeStruct*next;structNodeStruct*pre;}*Node;NodeNodeCreate(intval){Node x=(Node)malloc(sizeof(*x));x->val=val;x->next=x->pre=NULL;returnx;}typedefstruct{intcount;Node head,tail;}*Queue...
class Solution { public: //遇到(要将之前的结果res1,以及正负符号入栈---然后算(res2)内的值, //遇到)将此时()里面的值res2与()之前的值合并:1.正负2.res1 //例如:16+8+(1+(4+5+2)-3) //无符号时候:1.取数字---2.和之前的结果做加减运算3.遇到符号更新sign //遇到(:将已经算的结果pus...
Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer division should truncate toward zero. Example 1:
[LeetCode] 772. Basic Calculator III Problem Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or minus sign -, non-negative integers and empty spaces ....