剑指offer上的题目

#include "stdafx.h"#include
    
     using namespace std;int add(int a , int b){		do	{		int sum = a ^ b;		int carry = (a & b) << 1;		a = sum ;		b = carry;	}while( b != 0);	return a;}int main(int argc, char* argv[]){	int a = 1 , b = 1;	int c = add(a,b);	cout<< c <