48.不用加减乘除做加法(python)

public class Solution {
    public int Add(int num1,int num2) {
        while (num2!=0) {
            int temp = num1^num2;
            num2 = (num1&num2)<<1;
            num1 = temp;
        }
        return num1;
    }
}

 1 class Solution:
 2     def Add(self, num1, num2):
 3         # write code here
 4         while num2!=0:
 5             sum_ = num1 ^ num2
 6             carry = (num1 & num2)<<1
 7             num1=sum_%0x100000000
 8             num2=carry%0x100000000
 9         if num1<=0x7FFFFFFF:
10             return num1
11         else:
12             return num1 |(~0x100000000+1)