using System;
using System.Threading;
using System.Runtime.InteropServices;

namespace heater
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Heater
	{
		[StructLayout(LayoutKind.Sequential)]
			public struct SYSTEM_INFO 
		{
			public uint dwOemId;
			public uint dwPageSize;
			public uint lpMinimumApplicationAddress;
			public uint lpMaximumApplicationAddress;
			public uint dwActiveProcessorMask;
			public uint dwNumberOfProcessors;
			public uint dwProcessorType;
			public uint dwAllocationGranularity;
			public uint dwProcessorLevel;
			public uint dwProcessorRevision;
		}
		[DllImport("kernel32")]
		static extern void GetSystemInfo(ref SYSTEM_INFO pSI);

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			SYSTEM_INFO si = new SYSTEM_INFO();
			GetSystemInfo(ref si);
			int numThreads = (int)si.dwNumberOfProcessors;
			System.Diagnostics.Process.GetCurrentProcess().PriorityClass = System.Diagnostics.ProcessPriorityClass.Idle;
			Thread [] threads = new Thread[numThreads];
			for (int i = 0; i < numThreads; i++) 
			{
				threads[i] = new Thread(new ThreadStart(spin));
				threads[i].Priority = ThreadPriority.Lowest;
				threads[i].IsBackground = true;
				threads[i].Start();
			}
			Console.WriteLine("Press ENTER to exit the heater");
			Console.ReadLine();
		}

		static void spin()
		{
			float a = 4.431344F;
			int b = 3;

			while (true) 
			{
				a = a * b / 4;
				b += 1;
				a = a % 10;
			}
		}
	}
}