using System;
					
public class Program
{
	public static void Main()
	{
		Console.WriteLine("Hello World");
		Console.WriteLine("Hello World");
		
		int x1 = 5, x2 = 6;
		int x3 = ++x1 + ++x2;
		Console.WriteLine("x3 = {0}", x3);
		int x4 = x1++ + ++x1 - --x3 + x2++ + 1;
		//5 + 6 - 13 + 6 + 1 = 5 -> DUC 01 -> 03
		//5 + 6 - 12 + 6 + 1 = 6 -> DUC 02 -> 04
		//6 + 8 - 12 + 7 + 1 = 10 -> DAT -> 05
		
		Console.WriteLine("x4 = {0}", x4);
		
		int day = 5;
		switch(day) {
			case 1:
				Console.WriteLine("S 1");
				break;
			case 2:
				Console.WriteLine("M 2");
				break;
			case 3:
				Console.WriteLine("T 3");
				break;
			case 4:
				Console.WriteLine("W 4");
				break;
			case 5:
				Console.WriteLine("T 5");
				break;
			case 6:
				Console.WriteLine("F 6");
				break;
			case 7:
				Console.WriteLine("S 7");
				break;
			default:
				Console.WriteLine("Default");
				break;
		}
		
		int rows = 2;
		int columns = 2;
		
		Console.WriteLine("Ma Tran Vuong - START");
		for(int i=0;i<rows;i++) {
			for(int j=0;j<columns;j++) {
				Console.Write("{0} ", i*j);
			}
			Console.WriteLine("");
		}
		Console.WriteLine("Ma Tran Vuong - END");
		
		int x = 5123456;
		float y = 10324.34343434F;
		string str = "Tran Van\" A";
		
		String s2 = "Tran Van B";
		
		Console.WriteLine("x = " + x + ", y = " + y + ", str = " + str);
		
		//C# hay hon so vs C/C++/Java
		Console.WriteLine("x = ${0:#,###}, y = ${1:#,###.##}, str = {2} - {0} - {3}", x, y, str, s2);
		
		//Nhap du lieu trong C#
		Console.WriteLine("Nhap s3 = ");
		string s3 = Console.ReadLine();
		
		Console.WriteLine("Ket qua: {0}", s3);
		
		Console.WriteLine("Nhap x = ");
		x = Int32.Parse(Console.ReadLine());
		
		Console.WriteLine("Ket qua: {0}", x);
	}
}