LeetCode 371 Sum of Two Integers (位运算)

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Example:
Given a = 1 and b = 2, return 3.

Credits:
Special thanks to @fujiaozhu for adding this problem and creating all test cases.

题目链接：https://leetcode.com/problems/sum-of-two-integers/

题目分析：见前一篇博文

public class Solution {
    public int getSum(int a, int b) {
        if (b == 0) {
            return a;
        }
        int sum = a ^ b;
        int carry = (a & b) << 1;
        return getSum(sum, carry);
    }
}