371. 两整数之和

class Solution {
public:int getSum(int a, int b) {int flag = 0;int ans = 0;for(int i=0;i<32;++i){int num1 = a & 1;int num2 = b & 1;int temp;if(num1 == 1 && num2 == 1 && flag == 1){temp = 1;flag = 1 ;}else{if(num1==1 && num2 == 0 && flag == 1 || num1 == 0 && num2 == 1 && flag == 1 || num1 == 1 && num2 == 1 && flag == 0){temp = 0;flag = 1;}else{if(num1 == 1 || num2 == 1 || flag == 1){temp = 1;flag = 0;}else{temp = 0;flag = 0;}}}a = a >> 1;b = b >> 1;ans =  ans | (temp<<i) ;}return ans;}
};