题解 | #字符串最后一个单词的长度#

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

class Solution {
public:
    int firstWorld(string s)
    {
        int count = 0;
        int pos = s.rfind(" ");
        if (pos != string::npos)
        {
            int len = s.length();
            for (int i = len - 1; i > pos; i--)
            {
                ++count;
            }
                
            return count;
        }
        else
        {
            int len = s.length();
            return len;
        }
    }


};
int main()
{
  
    Solution sol;
    string s;
    getline(cin,s);
    int a = sol.firstWorld(s);
    cout << a << endl;
    
    return 0;
}