1 class Solution { 2 public int add(int a, int b) { 3 while(a != 0){ 4 int temp = a ^ b; 5 a = ((a & b) << 1); 6 b = temp; 7 } 8 return b; 9 } 10 }
转自https://www.jianshu.com/p/247a06f1c382