Head First C#
頭とからだで覚えるC#の基本
(オライリージャパン)
Andrew Stellman (著), Jennifer Green (著)
佐藤 嘉一 (監修), 木下 哲也 (翻訳)
開発環境
- Microsoft Windows 8.1 Pro (VMware Fusion 6, OS X Mavericks - Apple) (OS)
- C# (プログラミング言語)
- Microsoft Visual Studio Express 2013 for Windows Desktop (統合開発環境, IDE)
Head First C#―頭とからだで覚えるC#の基本 (Andrew Stellman (著)、Jennifer Green (著)、佐藤 嘉一 (監修)、木下 哲也 (翻訳)、オライリージャパン)の5章(継承: オブジェクトの系図)、エクササイズ(p.216)を解いてみる。
エクササイズ(p.216)
コード
Form1.cs
using System;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
Queen queen;
public Form1()
{
InitializeComponent();
Worker[] workers = new Worker[4];
workers[0] = new Worker(175, new string[] { "蜂蜜の収集", "蜂蜜の製造" });
workers[1] = new Worker(114, new string[] { "卵の世話", "幼虫の世話" });
workers[2] = new Worker(149, new string[] { "巣のメンテナンス", "パトロール" });
workers[3] = new Worker(155, new string[] {"蜂蜜の収集", "蜂蜜の製造", "卵の世話", "幼虫の世話", "巣のメンテナンス",
"パトロール"});
queen = new Queen(275, workers);
}
private void shifts_ValueChanged(object sender, EventArgs e)
{
}
private void assignWork_Click(object sender, EventArgs e)
{
string job = workerBeeJob.Text;
int n = (int)shifts.Value;
if (queen.AssignWork(job, n))
{
MessageBox.Show("'" + job + "'は、あと" + n + "シフトで終わる。", "女王蜂が言った");
}
else
{
MessageBox.Show("'" + job + "'を実行できる蜂がいない。", "女王蜂が言った。");
}
}
private void nextShift_Click(object sender, EventArgs e)
{
report.Text = queen.WorkTheNextShift();
}
}
class Bee
{
private double weight;
public Bee(double weight)
{
this.weight = weight;
}
public virtual int ShiftLeft
{
get { return 0; }
}
public virtual double GetHoneyConsumption()
{
double consumption;
if (ShiftLeft > 0)
{
consumption = ShiftLeft + 9;
}
else
{
consumption = 7.5;
}
if (this.weight > 150)
{
consumption *= 1.35;
}
return consumption;
}
}
class Queen : Bee
{
private Worker[] workers;
private int shiftNumber = 1;
public Queen(double weight, Worker[] workers):base(weight)
{
this.workers = workers;
}
public bool AssignWork(string job, int shiftsToWork)
{
for (int i = 0; i < workers.Length; ++i)
{
if (workers[i].DoThisJob(job, shiftsToWork))
{
return true;
}
}
return false;
}
public string WorkTheNextShift()
{
string report = "シフト#" + shiftNumber + "のレポート\r\n";
double consumption = 0;
for (int i = 0; i < workers.Length; ++i)
{
consumption += workers[i].GetHoneyConsumption();
}
consumption += this.GetHoneyConsumption();
for (int i = 0; i < workers.Length; ++i)
{
report += "働き蜂#" + (i + 1) + "は";
string job = workers[i].CurrentJob;
if (String.IsNullOrEmpty(job))
{
report += "は作業をしていません。";
}
else if (workers[i].WorkOneShift())
{
report += "このシフトで'" + job + "'の作業を完了します。";
}
else
{
report += "'" + job + "'の作業中で、あと" + workers[i].ShiftLeft + "つのシフトがあります。";
}
report += "\r\n";
}
report += "消費したすべての蜂蜜の量: " + consumption + "単位";
report += "\r\n";
++shiftNumber;
return report;
}
public override double GetHoneyConsumption()
{
double consumption = 0;
double max = 0;
int working = 0;
for (int i = 0; i < workers.Length; ++i)
{
if(workers[i].ShiftLeft > max)
{
consumption += workers[i].GetHoneyConsumption();
max = workers[i].ShiftLeft;
}
if (String.IsNullOrEmpty(workers[i].CurrentJob))
{
++working;
}
}
if (working > 3)
{
consumption += 30;
}
else
{
consumption += 20;
}
return consumption;
}
}
class Worker : Bee
{
private string currentJob = "";
private string[] jobsICanDo;
private int shiftsToWork;
private int shiftsWorked;
public Worker(double weight, string[] jobsICanDo):base(weight)
{
this.jobsICanDo = jobsICanDo;
}
public string CurrentJob
{
get { return currentJob; }
}
public override int ShiftLeft
{
get { return shiftsToWork - shiftsWorked; }
}
public bool DoThisJob(string job, int shiftsToWork)
{
if (!String.IsNullOrEmpty(currentJob))
{
return false;
}
for (int i = 0; i < jobsICanDo.Length; ++i)
{
if (jobsICanDo[i] == job)
{
currentJob = job;
this.shiftsToWork = shiftsToWork;
return true;
}
}
return false;
}
public bool WorkOneShift()
{
++shiftsWorked;
if (shiftsWorked == shiftsToWork)
{
shiftsWorked = 0;
shiftsToWork = 0;
currentJob = "";
return true;
}
return false;
}
public override double GetHoneyConsumption()
{
return base.GetHoneyConsumption();
}
}
}
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