import java.util.Scanner;
public class MathTest
{
    public static void main (String[] args)
    {
    	Scanner sc=new Scanner(System.in);
    	String choice,a="";
    	double x,y,myans,realans=0,diff=0,x1,y1;
    	final double MAX_DIFF=1e-6;
    	while(true)
    	{
    		System.out.println("-------------------------");
    		System.out.println("Select mode:");
    		System.out.println("\'m\' for a manually-set problem.");
    		System.out.println("\'r\' for a random problem.");
    		System.out.println("\'q\' to quit the problem.");
    		System.out.println("-------------------------");
    		System.out.print(">>");
    		choice=sc.next();
    		if(choice.equals("q"))
    			break;
    		else if(choice.equals("m"))
    		{
    			System.out.println("Enter x >> ");
    			x=sc.nextDouble();
    			System.out.println("Enter y >> ");
    			y=sc.nextDouble();
    			realans=x/y;
    			System.out.println("What is the value of "+x+"/"+y+" ?");
    			myans=sc.nextDouble();
    			diff=Math.abs(myans-realans);
    			if(diff<MAX_DIFF)
    				System.out.println("MathTest says\"Your answer is correct!\"");
    			else
    			{
    				if(myans>realans)
    					a="high";
    				else if(myans<realans)
    					a="low";
    				System.out.println("Your answer is "+diff+" too "+a);
    			}
    			System.out.println("Correct answer is "+realans);
    		}
    		else if(choice.equals("r"))
    		{
    			x1=Math.random()*100;
    			y1=Math.random()*100;
    			x=(double)(Math.round(x1*10))/10;
    			y=(double)(Math.round(y1*10))/10;
    			while(y==0)
    			{
    				y=(double)(Math.round(y1*10))/10;
    			}
    			realans=x/y;
    			System.out.println("What is the value of "+x+"/"+y+" ?");
    			myans=sc.nextDouble();
    			diff=Math.abs(myans-realans);
    			if(diff<MAX_DIFF)
    				System.out.println("MathTest says\"Your answer is correct!\"");
    			else
    			{
    				if(myans>realans)
    					a="high";
    				else if(myans<realans)
    					a="low";
    				System.out.println("Your answer is "+diff+" too "+a);
    			}
    			System.out.println("Correct answer is "+realans);
    		}
    		System.out.println("-- Press ENTER to take another test --");
    	}
    }

}