题解 | #配置文件恢复#

#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    vector<pair<string, string>> instru = {{"reset",""},{"reset","board"},{"board","add"},{"board","delete"},{"reboot","backplane"},{"backplane","abort"}};
    vector<string> outInstru = {"reset what","board fault","where to add","no board at all","impossible","install first"};
    while(getline(cin, s))
    {
        stringstream ss(s);
        string key1,key2;
        getline(ss, key1, ' ');
        getline(ss, key2, ' ');//按空格分割
        int count=0;
        string result;
        for(auto it=instru.begin();it!=instru.end();it++)//遍历
        {
            int i1=it->first.find(key1);
            int i2;
            if(key2!="")
                i2=it->second.find(key2);
            else if(key2==""&&it->second.empty())
                i2=0;
            else
                i2=-1;
            if(i1==0 && i2==0)
            {
                count++;
                result = outInstru[it-instru.begin()];
            }
        }
        if(count==1)
            cout<<result<<endl;
        else
            cout<<"unknown command"<<endl;
    }
}