请教一道Leetcode 题, 多谢# JobHunting - 待字闺中
I*e
1 楼
Reverse Integer
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).
遇到overflow时，能想到的是转换成string,但题目要求返回int。没想到怎么样“add
an extra
parameter”
请赐教。
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).
遇到overflow时，能想到的是转换成string,但题目要求返回int。没想到怎么样“add
an extra
parameter”
请赐教。
