[LeetCode]415. Add Strings

[LeetCode]415. Add Strings

题目描述

思路

水题，遍历字符串，按位相加即可

代码

#include <iostream>
#include <string>

using namespace std;

class Solution {
public:
    string addStrings(string num1, string num2) {
        string res;
        int temp1, temp2, carry = 0;
        for (int i = num1.size() - 1, j = num2.size() - 1; ; --i, --j) {
            if (i < 0 && j < 0)
                break;
            temp1 = 0, temp2 = 0;
            if (i >= 0)
                temp1 = num1[i] - '0';
            if (j >= 0)
                temp2 = num2[j] - '0';
            int temp_res = (temp1 + temp2 + carry) % 10;
            carry = (temp1 + temp2 + carry) / 10;
            res = to_string(temp_res) + res;
        }
        if (carry)
            res = to_string(carry) + res;
        return res;
    }
};

int main() {
    Solution s;
    cout << s.addStrings("11", "99") << endl;

    system("pause");
    return 0;
}