coding_interview_65_Add.cpp


int Add(int num1, int num2)
{
	int sum ;
	int carry; // 统计进位
	do
	{
		sum = num1 ^ num2;
		carry = (num1 & num2) << 1;
		num1 = sum;
		num2 = carry;
	} while (num2);

	return num1;
}