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PhoneBook.cs
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PhoneBook.cs
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using System;
using System.Collections.Generic;
class Phonebook
{
public static Dictionary<string, string> phoneNumbers = new Dictionary<string, string>();
static void Main()
{
Console.WriteLine("MAIN MENU");
Console.WriteLine("Would you like to add a person to your phone book? ['Y' for yes, 'Enter' for no]");
string answer = Console.ReadLine();
if (answer == "Y" || answer == "y")
{
AddContact();
}
else
{
Console.WriteLine("Would you like to lookup a number in your phone book? ['Y' for yes, 'Enter' for no]");
string lookUpAnswer = Console.ReadLine();
if (lookUpAnswer == "Y" || lookUpAnswer == "y")
{
LookUpContact();
}
else
{
Console.WriteLine("Are you finished with this program? ['Y' for yes, 'Enter' for no]");
string finishedAnswer = Console.ReadLine();
if (finishedAnswer == "Y" || finishedAnswer == "y")
{
Console.WriteLine("Goodbye.");
}
else
{
Main();
}
}
}
}
static void AddContact()
{
Console.WriteLine("NEW CONTACT");
Console.WriteLine("Enter a new contacts name");
string name = Console.ReadLine();
Console.WriteLine("Enter a new contacts phone number");
string number = Console.ReadLine();
if (phoneNumbers.ContainsKey(name))
{
Console.WriteLine("That person is already in your phonebook. Their number is " + phoneNumbers[name]);
}
else
{
phoneNumbers.Add(name, number);
}
Main();
}
static void LookUpContact()
{
Console.WriteLine("CONTACT LOOKUP");
Console.WriteLine("Whose number would you like to look up?");
string friend = Console.ReadLine();
if (phoneNumbers.ContainsKey(friend))
{
string value = phoneNumbers[friend];
Console.WriteLine(friend + "\'s phone number is " + value);
}
else
{
Console.WriteLine("That person is not in your phone book.");
}
Main();
}
}