58. Length of Last Word (String)
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) {
if(s.empty()) return ; int len = s.length();
int i = len - ;
int lastLen = ; // 去掉空格
while(s[i] == ' ' && i>=){
--i;
}//while
while(i >= && s[i] != ' '){
++lastLen;
--i;
}//while
return lastLen;
}
};
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