题解 | #配置文件恢复#

#include <iostream>
#include <sstream>
#include <map>

using namespace std;

map<string, string> mp = {{"reset", "reset what"}, {"reset board", "board fault"}, {"board add", "where to add"},
    {"board delete", "no board at all"}, {"reboot backplane", "impossible"},
    {"backplane abort", "install first"}
};

int main() {
    string str;
    while (getline(cin, str)) {
        bool flag = false;
        string first, second;
        if (str.find(' ') != string::npos) {
            int p = str.find(' ');
            first = str.substr(0, p);
            second = str.substr(p + 1);
            int k = 1;
            string res;
            for (auto it : mp) {
                if (it.first.find(' ') != string::npos) {
                    int pos = it.first.find(' ');
                    string a = it.first.substr(0, pos);
                    string b = it.first.substr(pos + 1);
                    if (a.substr(0, first.size()) == first &&
                            b.substr(0, second.size()) == second) {
                        k--;
                        res = it.first;
                    }
                }
            }
            if (k == 0) {
                flag = true;
                cout << mp[res] << endl;
            }
        } else {
            string tem = "reset";
            if (tem.substr(0, str.size()) == str) {
                flag = true;
                cout << mp[tem] << endl;
            }
        }

        if (!flag) cout << "unknown command" << endl;
    }
    return 0;
}