using System;

namespace Design_Pattern
{ public class  Computer
{ private RAM Ram;
private CPU Cpu;
public Computer(RAM ram,CPU cpu)
{ this.Ram =ram;
this.Cpu =cpu;

Console .WriteLine("A Computer is Composed! "+this.Ram +" "+this.Cpu );
} }

public abstract class RAM
{  public abstract  Computer ComposeAComputer(CPU cpu);
}
public abstract class CPU
{ public abstract  Computer ComposeAComputer(RAM ram);
}

 public class pcRAM:RAM
{
public override Computer ComposeAComputer(CPU cpu)
{
Console .WriteLine ("pcComputer...");

return new Computer(this,cpu);
}  }

public class pcCPU:CPU
{
public override Computer ComposeAComputer(RAM ram)
{
Console .WriteLine ("pcComputer...");

return new Computer(ram,this);
} }

public class macRAM:RAM
{  public override Computer ComposeAComputer(CPU cpu)
{   Console .WriteLine ("MacComputer...");
return new Computer(this,cpu);
} }

public class macCPU:CPU
{  public override Computer ComposeAComputer(RAM ram)
{   Console .WriteLine ("MacComputer...");
return new Computer(ram,this);
} }

public abstract class abstractFactory
{ public abstract  RAM CreateRam();
public abstract CPU CreateCpu() ;
}

public class PcFactory:abstractFactory
{  public override RAM CreateRam()
{ return new pcRAM();
}
public override CPU CreateCpu()
{   return new pcCPU();
} }
public class MacFactory:abstractFactory
{
public override RAM CreateRam()
{
return new macRAM();  }
public override CPU CreateCpu()
{   return new macCPU();
} }

class ITMarket
{
private RAM ram;
private CPU cpu;
public ITMarket(abstractFactory factory)
{this.ram =factory.CreateRam();
this.cpu =factory.CreateCpu();
}
public void Run()
{ ram.ComposeAComputer(cpu);
cpu.ComposeAComputer(ram);
} }

class ClientApp
{  public static void Main(string[] args)
{
Console .WriteLine("PC Factory.....\n");
abstractFactory pcfactory=new PcFactory ();
ITMarket itMarket=new ITMarket (pcfactory);
itMarket .Run ();

Console .WriteLine("MAC Factory.....\n");
abstractFactory macfactory=new MacFactory();
itMarket =new ITMarket (macfactory);
itMarket .Run ();
}
}  }