Given an expression string array, return the final result of this expression Have you met this question in a real interview? Yes Example For the expression 2*6-(23+7)/(1+2), input is [ "2", "*", "6", "-", "(&qu…

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 . The expression string contains only non-nega…

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 . The expression string contains only non-nega…

题目如下: 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 . The expression string contains only no…

这道题就可以结合Basic Calculator中的两种做法了,分别是括号运算和四则运算的,则使用stack作为保持的结果,而使用递归来处理括号内的值的. class Solution { public: int calculate(string s) { ,res=,n=s.size(); stack<int> st; char op='+'; ;i<n;i++){ char c=s[i]; '){ num=num*+c-'; }else if(c=='('){ ; for(;i<…

This is sth. for me to learn.. https://github.com/kamyu104/LintCode/blob/master/C++/expression-evaluation.cpp…

Basic Calculator I 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 . You may assume that the g…

978. Basic Calculator https://www.lintcode.com/problem/basic-calculator/description public class Solution { /** * @param s: the given expression * @return: the result of expression */ public int calculate(String s) { // Write your code here Stack<Int…

Given an expression such as expression = "e + 8 - a + 5" and an evaluation map such as {"e": 1}(given in terms of evalvars = ["e"] and evalints = [1]), return a list of tokens representing the simplified expression, such as […

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 ex…