Java 代码

class Solution {
    public int add(int num1, int num2) {
        int res = num1 ^ num2;
        int carry = (num1 & num2) << 1;
        while(carry != 0){
            int result = carry ^ res;
            carry = (carry & res) << 1;
            res =result;
        }
        return res;
    }
}