A + B 问题

 1 class Solution {
 2 public:
 3     /*
 4      * @param a: The first integer
 5      * @param b: The second integer
 6      * @return: The sum of a and b
 7      */
 8     int aplusb(int a, int b) {
 9         // write your code here, try to do it without arithmetic operators.
10         int result=0,num=0;
11 
12         do {
13             result = a ^ b;
14             num = (a & b) << 1;
15             a = result;
16             b = num;
17         }
18         while(b != 0);
19 
20         return result;
21     }
22 };