LeetCode 371 Sum of Two Integers
概述
https://leetcode.com/problems/sum-of-two-integers/
剑指 Offer 原题： https://iamazing.cn/page/sword-offer-65
位运算
实现的时候注意，左移优先级比 & 高！
class Solution {
public:
int getSum(int a, int b) {
int sum = a ^ b;
int carry = (unsigned int) (a & b) << 1;
if (!carry) return sum;
else return getSum(sum, carry);
}
};