using System;

namespace C_Sharp_Console
{
	/// <summary>
	/// My Very First C# Program.
	/// 
	/// </summary>
	using System;
	using System.Collections;  // needed for ArrayList
	using System.IO ;  // needed for file IO
	public class Class1
	{
		/// <summary>
		/// This is a sample program that demonstrates
		/// <list type=bullet>
		///<item><term>Output formatting</term></item>
		///<item>File I/O</item>
		///<item>ArrayLists</item>
		///<item>Iteration</item>
		///<item>Variable parameter lists</item>
		///<item>Random Number Generation</item>
		///<item>inline documentation</item>
		/// </list>
		/// </summary>
		
		static void Main()
		{
			Class1 c = new Class1();

			int x = 1 ;
			int y = -2 ;
			int z = 4 ;
			int m = c.sum(3,1,4,1,5,9) ; 
			int n = c.sum(x,y,z) ;
			Console.WriteLine("m={0}, n={1}",m,n) ;

			ArrayList name = new ArrayList();
			name.Add("Gizmo");
			name.Add(75);
			for(int i=0; i<name.Count; i++)
				Console.WriteLine("name[{0}]={1}",i,name[i]) ;

			//			ArrayList a = new int();  // invalid form
			//			int a = new ArrayList();  // invalid form

			while(n>0)
			{
				Console.WriteLine("n={0}",n) ;
				n-- ;
			}

			do 
			{
				Console.WriteLine("n={0}",n) ;
				n++ ;
			} while(n<5) ;

			StreamWriter outstr = new StreamWriter("testout.txt") ;
			outstr.WriteLine("All your base are belong to us.") ;
			outstr.Close() ;
			StreamReader instr = new StreamReader("testout.txt") ;
			string s = instr.ReadToEnd() ;
			Console.WriteLine("File says: {0}", s) ;

			Console.WriteLine("Random Number Generation:") ;
			Random RNG = new Random() ;
			for(int i=0; i<10; i++)
			{
				// Generate random ints in [10,99]:
				int k = RNG.Next(10,100) ;
				Console.WriteLine("k={0}",k) ;
			}

		}

		public int sum(params int[] vals)
		{
			/// <param name="vals">
			/// any number of integer arguments may be supplied
			/// to this routine.
			/// </param>
			int temp=0 ;
			foreach(int n in vals)
				temp += n ;
			return temp ;
		}
	}
}