enums and collections - Organizing your data - Stack, Queue

Head First C#:
A Learner's Guide to Real-World Programming
with C# and .NET
Kindle版

開発環境

Head First C Sharp: A Learner’s Guide to Real-World Programming with C Sharp and .NET (Andrew Stellman(著)、Jennifer Greene(著)、O’Reilly Media)の Chapter 8(enums and collections - Organizing your data)、p.449(Exercise)の解答を求めてみる。

コード

Program.cs

using ConsoleApp6;

Console.Write("First lumberjack's name: ");
Queue<Lumberjack> lumberjacks = new Queue<Lumberjack>();
string? nameOrNull;
Random random = new Random();
while ((nameOrNull = Console.ReadLine()) != "")
{
    if (nameOrNull == null)
    {
        continue;
    }
    Console.Write("Number of flapjacks: ");
    if (int.TryParse(Console.ReadLine(), out int numberOfFlapjacks))
    {
        string name = nameOrNull.ToString();
        Lumberjack lumberjack = new Lumberjack(name);
        for (int i = 0; i < numberOfFlapjacks; i++)
        {
            lumberjack.TakeFlapjack((Flapjack)random.Next(4));
        }
        lumberjacks.Enqueue(lumberjack);
    }
    Console.Write("Next lumberjack's name (blank to end): ");
}
while (lumberjacks.Count > 0)
{
    lumberjacks.Dequeue().EatFlapjacks();
}

Flapjack.cs

namespace ConsoleApp6;

public enum Flapjack
{
    Crispy,
    Soggy,
    Browned,
    Banan,
}

Lumberjack.cs

namespace ConsoleApp6;

public class Lumberjack
{
    public string Name { get; }
    private Stack<Flapjack> flapjackStack = new Stack<Flapjack>();
    public void TakeFlapjack(Flapjack flapjack)
    {
        flapjackStack.Push(flapjack);
    }
    public void EatFlapjacks()
    {
        Console.WriteLine($"{Name} is eating flapjacks");
        while (flapjackStack.Count > 0)
        {
            Console.WriteLine($"{Name} ate a {flapjackStack.Pop().ToString().ToLower()}");
        }
    }
    public Lumberjack(string name)
    {
        Name = name;
    }
}

入出力結果(Terminal, Zsh)

% dotnet run
First lumberjack's name: Number of flapjacks: Erik
Next lumberjack's name (blank to end): 
kamimura@kamimuras-MacBook ConsoleApp6 % dotnet run    
First lumberjack's name: Erik
Number of flapjacks: 4
Next lumberjack's name (blank to end): Hidur
Number of flapjacks: 6
Next lumberjack's name (blank to end): Jan
Number of flapjacks: 3
Next lumberjack's name (blank to end): Betty
Number of flapjacks: 4
Next lumberjack's name (blank to end): 
Erik is eating flapjacks
Erik ate a banan
Erik ate a browned
Erik ate a crispy
Erik ate a banan
Hidur is eating flapjacks
Hidur ate a banan
Hidur ate a browned
Hidur ate a browned
Hidur ate a soggy
Hidur ate a crispy
Hidur ate a crispy
Jan is eating flapjacks
Jan ate a browned
Jan ate a banan
Jan ate a browned
Betty is eating flapjacks
Betty ate a soggy
Betty ate a banan
Betty ate a banan
Betty ate a crispy
% dotnet run         
First lumberjack's name: Erik
Number of flapjacks: 4
Next lumberjack's name (blank to end): Hildur
Number of flapjacks: 6
Next lumberjack's name (blank to end): Jan
Number of flapjacks: 3
Next lumberjack's name (blank to end): Betty
Number of flapjacks: 4
Next lumberjack's name (blank to end): 
Erik is eating flapjacks
Erik ate a crispy
Erik ate a crispy
Erik ate a banan
Erik ate a banan
Hildur is eating flapjacks
Hildur ate a soggy
Hildur ate a browned
Hildur ate a soggy
Hildur ate a crispy
Hildur ate a banan
Hildur ate a banan
Jan is eating flapjacks
Jan ate a banan
Jan ate a crispy
Jan ate a crispy
Betty is eating flapjacks
Betty ate a soggy
Betty ate a soggy
Betty ate a soggy
Betty ate a soggy
%