【leetcode】415. Add Strings

problem

415. Add Strings

solution:

class Solution {
public:
    string addStrings(string num1, string num2) {
        int i = num1.size()-;
        int j = num2.size()-;
        int carry = ;
        string res = "";
        while(i>= || j>= || carry)
        {
            int tmp = ((i<)?:(num1[i--]-'')) + ((j<)?:(num2[j--]-'')) + carry;//注意运算符的优先级顺序.
            carry = tmp/;
            res = to_string(tmp%) + res;
        }
        return carry ? (''+res) : res;//err.
    }
};

参考

1. Leetcode_415. Add Strings;

完