题解 | #字符串最后一个单词的长度#

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

int main() {
    int a, b = 0,c,answer = 0,p = 0;
    string k,m;
    //cin>>k;
    getline(cin,k);
    for(int i = 0;i<k.length();i++)
    {

        if(k[i]==' ')
        {
            b++;
        }
        //cout<<b;
    }
    if(b == 0)
    {
        cout<<k.length();
        return 0;
    }
    for(int i = 0;i<k.length();i++)
    {
        
        if(k[i]==' ')
        {
            p++;
        }
        //cout<<p<<endl;
        if(p == b)
        {
            c = i;
            //cout<<c;
            break;
        }
    }
    for(int i = c + 1;i<k.length();i++)
    {
        int j = 0;
        m[j] = k[i];
        answer++;
    }
    //cout<<b;
    cout<<answer<<endl;
    //cout<<"最后一个单词为"<<m<<"，长度为"<<answer;
}

小白代码，思路定位最后一个空格，注意循环的终止