1 /************************************************************************* 2     > File Name: 47_AddTwoNumbers.c 3     > Author: Juntaran 4     > Mail: JuntaranMail@gmail.com 5     > Created Time: 2016年09月04日 星期日 21时33分07秒 6  ************************************************************************/ 7   8 #include <stdio.h> 9 10 // 移位求两数相加11 int ADD(int num1, int num2)12 {13     int sum, carry;14     if (num1 == 0)15         return num2;16     if (num2 == 0)17         return num1;18     19     while (num2 != 0)20     {21         sum = num1 ^ num2;22         carry = (num1 & num2) << 1;23         24         num1 = sum;25         num2 = carry;26     }27     return sum;28 }29 30 int main()31 {32     int num1 = 5;33     int num2 = 37;34     35     int sum = ADD(num1, num2);36     printf("sum is %d\n", sum);37     return 0;38 }