查找数字的总和

问题描述：

我有一个5位整数，例如

I have a 5-digit integer, say

int num = 23456;

如何查找其数字的总和？

How to find the sum of its digits?

答

使用取模运算来获取最低有效数字的值：

Use the modulo operation to get the value of the least significant digit:

int num = 23456;
int total = 0;
while (num != 0) {
    total += num % 10;
    num /= 10;
}

如果输入可能为负数，则输入检查并反转符号。

If the input could be a negative number then it would be a good idea to check for that and invert the sign.