Emulator

//by Maksym Oboznyi
#include <iostream>

using namespace std;

int main(int argc, char ** argv, char ** envp)
{
    cout << "Welcome to command line emulator\nVersion 0.0.7 by Maksym Oboznyi, K-16\n";
    while (1) {
        cout << "promt>";
        string query;
        cin >> query;
        if (query == "quit") {
            cout << "Slava Bitu! Have a nice day.\n";
            return 0;
        }
        if (query == "argc") {
            cout << argc << "\n";
            getline(cin, query);///spaces, other trash after the command
            continue;
        }
        if (query == "argv") {
            for (int i = 0; i < argc; i++)
                cout << argv[i] << "\n";
            getline(cin, query);///spaces, other trash after the command
            continue;
        }
        if (query == "envp") {
            for (int i = 0; envp[i]; i++)
                cout << envp[i] << "\n";
            getline(cin, query);///spaces, other trash after the command
            continue;
        }
        if (query == "echo") {
            getline(cin, query);
            int first_good = 0;
            while (first_good < query.size() && query[first_good] == ' ' )
                first_good++;

            if (query[first_good] == '\n') { ///empty string
                cout << "\n";
                continue;
            }

            if (query[first_good] != '\"') { ///one-line query
                string_view s = query;
                while (s.size() > 0) {
                    s.remove_prefix(min(s.find_first_not_of(" "), s.size()));
                    if (s.size() > 0) {
                        cout << s.substr(0, s.find(" ")) << endl;
                        s.remove_prefix(min(s.find(" "), s.size()));
                    } else
                        break;
                }
            } else {
                string whole_query = "";
                for (int i = first_good + 1; i < query.size(); i++)
                    whole_query += query[i];
                bool was = 0; ///reading until the second "
                while (!was) {
                    whole_query += " ";///divide words
                    getline(cin, query);
                    for (int i = 0; i < query.size(); i++)
                        if (query[i] == '\"') {
                            was = 1;
                            break;
                        }
                        else
                            whole_query += query[i];
                }
                string_view s = whole_query;
                while (s.size() > 0) {
                    s.remove_prefix(min(s.find_first_not_of(" "), s.size()));
                    if (s.size() > 0) {
                        cout << s.substr(0, s.find(" ")) << endl;
                        s.remove_prefix(min(s.find(" "), s.size()));
                    } else
                        break;
                }
            }
            continue;
        }
        cout << "ERROR: No command found: " << query << "\n";
    }
    return 0;
}