回文题

标签：校园招聘   c   

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

For example,
"A man, a plan, a canal: Panama" is a palindrome.
"race a car" is not a palindrome.

Note:
Have you consider that the string might be empty? This is a good question to ask during an interview.

For the purpose of this problem, we define empty string as valid palindrome.

需要注意点：

1）empty string问题(不能用while(!chacter[left]) left++)而要用if(!chacter[left]){left++ continue}

2)大小写字母的转换，注意0~9系统是认识的。

class Solution {

回文题

标签：校园招聘   c   

原文地址：http://blog.csdn.net/shahongzhou/article/details/40353895