标签:io ar sp for on art bs html ef
这个题目很简单,给一个字符串,然后返回最后一个单词的长度就行。题目如下:
Given a string s consists of upper/lower-case alphabets and empty space characters
‘ ‘
, return the length of last word in the string.If the last word does not exist, return 0.
Note: A word is defined as a character sequence consists of non-space characters only.
For example,
Given s =
"Hello World"
,return
5
.
我的思路就是先把字符串反转,然后找到第一个‘ ‘后弹出,这个需要注意的大概就是很可能最后不是字符,而是一个标点,所以要判断一下。题解如下:
class Solution { public: int lengthOfLastWord(const char *s) { string tmp = s; reverse(tmp.begin(), tmp.end()); int sum, i, len; sum = i = 0; len = tmp.length(); while (i < len) { if (isalpha(tmp[i])) { sum++; i++; break; } else { i++; } } while (tmp[i] != ‘ ‘ && i < len) { sum++; i++; } return sum; } };
如上,不难。
[leetcode] 18. Length of Last Word
标签:io ar sp for on art bs html ef
原文地址:http://www.cnblogs.com/TinyBox/p/4122254.html