题解 | #不用加减乘除做加法#

public class Solution {
    public int Add(int num1,int num2) {
        int sum1,sum2;
        do{
            sum1=num1^num2;
            sum2=(num1&num2)<<1;
            num1=sum1;
            num2=sum2;
        }while(num2!=0);
        return num1;
    }
}