import java.util.Random;
import java.lang.Math;

public class channal{
	public static void main(String args[])
	{
		String channalmanager=new String("NONE");
		float f;
		String [] mem=new String[3];
		String [] dev=new String[3];
		mem[0]=new String("boss");
		mem[1]=new String("employer");
		mem[2]=new String("me");
		
		while(true)
		{
			if(channalmanager.equals("NONE"))
			{
				System.out.println("CPU正在運行用戶程序！");
			    Random r=new Random();
		        f=r.nextFloat();
		        if(f>0.5) channalmanager="INIT";
		        continue;
		    }
		    if(channalmanager.equals("INIT"))
		    {
		    	System.out.println("CPU is interrupted!");
		    	System.out.println("CPU 編制通道程序和啟動設備!");
		    	System.out.println("CPU 又轉回用戶程序!");
		    	System.out.println("現在正在進行數據傳輸!");
		    	for(int i=0;i<Math.max(Math.max(mem[0].length(),mem[1].length()),mem[2].length());i++)
		    	{
		    		for(int j=0;j<mem.length;j++)
		    		{
		    			if(i<mem[j].length())
		    			{
		    				dev[j]=mem[j].substring(0,i+1);
		    				System.out.println("DEV 0 :"+dev[0]);
		    	            System.out.println("DEV 1 :"+dev[1]);
		    	            System.out.println("DEV 2 :"+dev[2]+"\n");
		    				
		    			}
		    		}
		    	}
		    	
		    	channalmanager="FINISH";
		    	System.out.println("數據已經傳輸完成!");
		    	System.out.println("通道程序向CPU發出FINISH中斷請求!");
		    	continue;

		    }
		    if(channalmanager.equals("FINISH"))
		    {
		    	System.out.println("CPU 響應中斷請求!");
		    	System.out.println("管理程序也在登記或處理!");
		    	System.out.println("設備也在關閉!");
		    	System.out.println("CPU 又轉回用戶程序!");
		    	channalmanager="NONE";
		    	if(new Random().nextFloat()>0.5) break;
		    }
		    
		}
	}
}