開発環境
- Microsoft Windows 7 Home Premium (OS)
- Microsoft Visual C# 2010 Express Edition (IDE)
- 言語: C#
『初めてのC# 第2版』(Jesse Liberty+Brian MacDonald著、日向俊二訳、オライリー・ジャパン、2006年、ISBN978-487311-294-7)の 第14章(ジェネリックとコレクション)13.10(練習問題)練習14-2を解いてみる。
その他参考書籍
練習14-2.
コード
using System; using System.Collections.Generic; abstract class Animal : IComparable<Animal> { private int weight; private string name; public Animal(int weight, string name) { this.weight = weight; this.name = name; } public abstract void Speak(); public abstract void Move(); public override string ToString() { return "Name:" + name + ", Weight:" + weight; } #region IComprable public bool Equals(Animal other) { if (this.weight == other.weight) { return true; } return false; } public int CompareTo(Animal rhs) { return this.weight.CompareTo(rhs.weight); } #endregion IComprable } class Cat : Animal { public Cat(int weight, string name) : base(weight, name) { } public override void Speak() { Console.WriteLine("ニャーニャー"); } public override void Move() { Console.WriteLine("するする"); } } class Dog : Animal { public Dog(int weight, string name) : base(weight, name) { } public override void Move() { Console.WriteLine("ワンワン"); } public override void Speak() { Console.WriteLine("てくてく"); } } class Tester { public void Display(List<Animal> list) { foreach (Animal anial in list) { Console.WriteLine(anial.ToString()); } } public void Run() { Dog pochi = new Dog(10, "Pochi"); Dog taro = new Dog(20, "Taro"); Cat sora = new Cat(5, "Sora"); Cat tama = new Cat(15, "Tama"); Animal[] animals = { pochi, taro, sora, tama }; List<Animal> animalList = new List<Animal>(); foreach (Animal animal in animals) { animalList.Add(animal); } Console.WriteLine("ソート前"); Display(animalList); animalList.Sort(); Console.WriteLine("重さでソート後"); Display(animalList); } static void Main() { Tester t = new Tester(); t.Run(); } }
入出力結果(Console Window)
ソート前 Name:Pochi, Weight:10 Name:Taro, Weight:20 Name:Sora, Weight:5 Name:Tama, Weight:15 重さでソート後 Name:Sora, Weight:5 Name:Pochi, Weight:10 Name:Tama, Weight:15 Name:Taro, Weight:20 続行するには何かキーを押してください . . .
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