public class Solution { public int Add(int num1,int num2) { while(num2 != 0){//进位为0时，跳出循环 int sum = num1^num2;//非进位求和 int temp = (num1&num2)<<1; //计算出进位； num1 = sum; //非进位和 num2 = temp; //进位； } return num1; } }