代码改变世界我是程序员;您好程先生;叫我序员就好了技术文

LeetCode[7] 反转整数

2016-03-19  本文已影响0人  Jeffbond

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return -321

Have you thought about this?
Here are some good questions to ask before coding. Bonus points for you if you have already thought through this!

If the integer's last digit is 0, what should the output be? ie, cases such as 10, 100.

Did you notice that the reversed integer might overflow? Assume the input is a 32-bit integer, then the reverse of 1000000003 overflows. How should you handle such cases?

For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

My Solution

public class Solution {
    public int reverse(int x) {
        long result=0;
        while(x!=0){
            result=result*10+x%10;
            if(result>Integer.MAX_VALUE||result<Integer.MIN_VALUE)
            return 0;
            x/=10;
        }
        return (int)result;
    }
}
上一篇下一篇

猜你喜欢

热点阅读