Question

The program is in java. The problems are it will not simplify any kind of odd number, and it will simplify some incorrectly. For example, if you input 17, it will print nothing out. If you input 200, it will print sqrt(200) when the answer is 10 * sqrt(2). I just can't seem to figure out why.

import java.util.Scanner;
public class Radicals
{
 public static void main(String[] args)
 {
  Scanner in = new Scanner(System.in);
  System.out.println("Please enter the radical to simplify: sqrt(x)");
  System.out.print("x: ");
  double rad = in.nextDouble();
  double simp = Math.sqrt(rad);
  if((int)simp == simp)
  {
   System.out.print("Simplest form is: " + (int)simp);
  }
  else if(rad < 0)
  {
   System.out.print("Enter positive integers only!");
  }
  else
  {
   for(double i = 2; i < rad; i++)
   {
    if(rad / i == (int)(rad / i))
    {
     double a = rad / i;
    for(int z = 2; z < a; z++)
    {
     if(a / z == (int)(a / z))
     {
      if(Math.sqrt(a)  == (int)(Math.sqrt(a)))
      {
       System.out.print("sqrt(" + (int)rad + ")");
      }
      else
      {
       System.out.println(Math.sqrt(a) + " * sqrt(" + i + ")");
      }
      break;
     }
    }
    }
    break;
   }

  }
  in.close();
 }
}