HanzawaNaoki.cs

using System;
using System.Text;

namespace HanzawaNaoki {
	class Program {
		static void Main(string[] args) {
			Console.OutputEncoding = new UnicodeEncoding();
			Console.WindowWidth = 120;
			Console.WriteLine(new HanzawaNaoki(1));
			Console.WriteLine(new HanzawaNaoki(2));
			Console.WriteLine(new HanzawaNaoki(5));
			Console.WriteLine(new HanzawaNaoki(10));
			Console.WriteLine(new HanzawaNaoki(7) + 6);
			Console.WriteLine(new HanzawaNaoki(new HanzawaNaoki(9)));
			Console.WriteLine(new HanzawaNaoki(4) + new HanzawaNaoki(3));
			Console.ReadKey();
		}
	}
	public class HanzawaNaoki {
		private bool isNeedHundredReturn;
		private int _rememberedValue;
		private int rememberedValue {
			get {
				return this._rememberedValue * 10;
			}
			set {
				this._rememberedValue = value;
			}
		}
		public HanzawaNaoki(int t, bool hundred = false) {
			this.isNeedHundredReturn = hundred;
			this.rememberedValue = t;
		}
		public HanzawaNaoki(HanzawaNaoki hn) {
			this.isNeedHundredReturn = true;
			this.rememberedValue = hn.rememberedValue;
		}
		public static HanzawaNaoki operator + (HanzawaNaoki hn1, HanzawaNaoki hn2) {
			return new HanzawaNaoki(hn1.rememberedValue + hn2.rememberedValue, true);
		}
		public static HanzawaNaoki operator + (HanzawaNaoki hn, int i) {
			return new HanzawaNaoki(hn.rememberedValue + i * 10, true);
		}
		public static HanzawaNaoki operator + (int i, HanzawaNaoki hn) {
			return hn + i;
		}
		public override string ToString() {
			return string.Format("有仇必報，{2}倍奉還！やられたらやり返す。{2}倍返しだ！You give me {0}, I'll give you {1}!!", this._rememberedValue, this.rememberedValue, (this.isNeedHundredReturn ? "百" : "十"));
		}
	}
}