C#入門で書いたコード

001.cs

using System;

namespace CSharpLearning
{
	class MainClass
	{
		struct Point
		{
			public int x;
			public int y;
		}

		public static void Main(string[] args)
		{
			int x = 3;
			int y = 4;
			Console.WriteLine(x + y);
			Console.WriteLine(x - y);
			Console.WriteLine(x * y);
			Console.WriteLine(x / y);

			Console.WriteLine("---");

			double f = 5.5;
			int f_dash = (int)f;
			Console.WriteLine(f);
			Console.WriteLine(f_dash);

			Console.WriteLine("---");

			string s = "サンプルテキスト";
			Console.WriteLine(s + "追加のテキスト");
			Console.WriteLine("{0}と{1}はお友達", 10, 20);
			Console.WriteLine(string.Format("{0}と{1}はお友達", 10, 20));

			Console.WriteLine("---");

			int[] arrx = new[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
			int i = 0;
			while (i < arrx.Length)
			{
				Console.WriteLine(arrx[i]);
				++i;
			}

			Console.WriteLine("---");

			for (i = 0; i < arrx.Length; i++)
			{
				Console.WriteLine(arrx[i]);
			}

			Console.WriteLine("---");

			foreach (var item in arrx)
			{
				Console.WriteLine(item);
			}

			Console.WriteLine("---");

			foreach (var item in arrx)
			{
				if (item % 2 == 0)
				{
					Console.WriteLine("偶数");
				}
				else
				{
					Console.WriteLine("奇数");
				}
			}

			Console.WriteLine("---");

			x = 2;
			int sq = Square(x);
			Console.WriteLine(sq);

			Console.WriteLine("---");

			var p = new Point { x = 10, y = 10 };
			Console.WriteLine("p.x is {0}", p.x);
			Console.WriteLine("p.y is {0}", p.y);
		}

		static int Square(int x)
		{
			return x * x;
		}
	}
}

fizbuzz.cs

using System;

namespace CSharpLearning
{
	class MainClass
	{
		public static void Main(string[] args)
		{
			int max = 100;
			for (int i = 1; i < max; i++)
			{
				if (i % 15 == 0)
				{
					Console.WriteLine("Fizz Buzz");
				}
				else if (i % 3 == 0)
				{
					Console.WriteLine("Fizz");
				}
				else if(i % 5 == 0)
				{
					Console.WriteLine("Buzz");
				}
				else
				{
					Console.WriteLine(i);
				}
			}
		}
	}
}