SimpleAddressBook.cpp

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
    vector<string> contacts;

    while(true)
    {
        string userChoice;
        cout << "Welcome to your Adress book!\nWhat do you want to do?\n";
        cout << "| List       | Lists all users         |\n| Add        | Adds an user            |\n| Delete     | Deletes an user         |\n| Delete all | Removes all users       |\n| Search     | Search or a user        |\n| Close      | Closes the addgess book |\n";
        getline(cin, userChoice);
        if(userChoice == "list" or userChoice == "List")
        {
            if(contacts.empty() == true)
            {
                cout << "No users found!" << endl;
            }
            else
            {
                for(int i = 0; i < contacts.size(); i++)
                {
                    cout << contacts[i] << endl;
                }
            }
        }
        else if (userChoice == "add" or userChoice == "Add") {
            string newUser;
            cout << "Enter the user you want to add: " << endl;
            getline(cin, newUser);
            contacts.push_back(newUser);
            cout << "User Added!" << endl;
        }
        else if (userChoice == "delete" or userChoice == "Delete") {
            string delUser;
            cout << "Enter the user you want to delete: " << endl;
            getline(cin, delUser);
            contacts.erase(remove(contacts.begin(), contacts.end(), delUser), contacts.end());
            cout << "User deleted!" << endl;
        }
        else if (userChoice == "delete all" or userChoice == "Delete all") {
            contacts.clear();
            cout << "All the users deleted!" << endl;
        }
        else if (userChoice == "search" or userChoice == "Search") {
            string searchUser;
            cout << "Enter the user you want to search for: " << endl;
            getline(cin, searchUser);
            if(find(contacts.begin(), contacts.end(), searchUser) != contacts.end())
            {
                cout << "Contact is found!" << endl;
            }
            else
            {
                cout << "Contact is not found!" << endl;
            }
        }
        else if (userChoice == "close" or userChoice == "Close")
        {
            cout << "Closing..." << endl;
            break;
        }
        else
        {
            cout << "Undefined action, please try again!" << endl;
        }
    }

    return 0;
}