题解 | 字符串最后一个单词的长度

#include <iostream>
#include <string>
using namespace std;

int LastWordLength(const string &s)
    {
        int left = 0;
        int right = 0;
        int res = 0;
        while(right <= s.length())
        {
            if(right == s.length() || s[right] == ' ')
            {
                res = right - left;
                right++;
                left = right;
            }
            else
            {
                right++;
            }
        }
        return res;
    }

int main() {
    string s;
    while (getline(cin>>ws, s)) { 
        int length = LastWordLength(s);
        cout<<length<<endl;        
    }
}
// 64 位输出请用 printf("%lld")