kvdb.cxx

"#include <iostream>
#include <map>
#include <string>

using namespace std;

int main()
{
    map<string, string> db;
    cout << "Welcome to the simplest key-value database" << endl;
    while (1)
    {
        cout << "What do you want to do?" << endl;
        cout << "Enter P to [P]ut, G to [G]et or L to [L]ist" << endl;
        cout << "Or enter Q to [Q]uit" << endl;
        string action;
        getline(cin, action);
        if (action == "P")
        {
            string key;
            string data;
            cout << "Enter key: ";
            getline(cin, key);
            cout << "Enter data: ";
            getline(cin, data);
            db[key] = data;
        }
        if (action == "G")
        {
            cout << "Enter key: ";
            string key;
            getline(cin, key);
            if (db.find(key) != db.end())
            {
                cout << "Your data: " << db[key] << endl;
            }
            else
                cout << "No such key" << endl;
        }
        if (action == "L")
        {
            cout << "DB contents:" << endl;
            for (auto it = db.begin(); it != db.end(); it++)
            {
                cout << it->first << ": " << it->second << endl;
            }
        }
        if (action == "Q")
        {
            cout << "Bye" << endl;
            break;
        }
        cout << endl;
    }

    return 0;
}