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);
}
}