题解 | #字符串最后一个单词的长度#

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

int main() {
    string str;
    getline(cin, str);
    int a = str.length();
    int b;
     for (int i = 0; i < a; ++i) {
        if (i == 0 && str[i] !=' ') {
            b=1;
        }
        else if (i == 0 && str[i] == ' ') {
           b=0;
        }
        else if (str[i] != ' ' && str[i - 1] != ' ') {
           b+=1;
        }
        else if(str[i] != ' ' && str[i - 1] == ' ') {
          b=1;
        }
    }
    cout << b << endl;
}