【LeetCode】58. Length of Last Word

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

.

class Solution {
public:
int lengthOfLastWord(string s) {
int len = s.length();
if(len==0) return 0;
int re = 0;
int i = len-1;
while(i>=0 && s[i]==' ')
i--;
for( ; i >= 0; i--)
{
if(s[i]!=' ')
re++;
else
break;
}
return re;
}
};