LeetCode Length of Last Word

题目

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.

 

求最后一个单词的长度，注意结尾可能是多个空格。

 

代码：

class Solution {
public:
    int lengthOfLastWord(const char *s) {
        int ans=0;
		int i=0,temp=0;		//字符串位置，当前单词字符数
		while(s[i]!='\0')
		{
			if(s[i]!=' ')
				temp++;
			else
			{
				if(temp!=0)		//跳过结尾的空格
					ans=temp;
				temp=0;
			}
			i++;
		}
		if(temp!=0)
			ans=temp;
		return ans;
    }
};