Reverse Integer

最新推荐文章于 2020-07-05 10:18:11 发布

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本文探讨了如何反转整数及其可能遇到的问题，包括边界条件处理和溢出防范。详细解析了不同情况下的反转逻辑，并提供了代码示例。

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?
Throw an exception? Good, but what if throwing an exception is not an option? You would then have
to re-design the function (ie, add an extra parameter).