/**
 * @(#)group-assignment.java
 *
 * group-assignment application
 *
 *Write a recursive method that 
 *converts a decimal integer to a 
 *binary string. Write a recursive 
 *method that converts a binary string 
 *to a decimal integer.. 
 *
 * @author 
 * @version 1.00 2007/11/26
 */
 




import java.util.*;


class convertdecimal
{


 

public static String decimalbinaryconvert(int decimalinput, StringBuffer tempstorage)
{
tempstorage.append(decimalinput % 2);
decimalinput /= 2;
if (decimalinput == 0) 
return tempstorage.reverse().toString();
else 
return decimalbinaryconvert(decimalinput, tempstorage);
}




// 	BINARY TO DECIMAL = 1
//  DECIMAL TO BINARY = 2
//  NOTHING = 0
    public static void main(String[] args)
    	
    {
       
        Scanner scan1 = new Scanner(System.in);
        Scanner scan2 = new Scanner(System.in);
        Scanner binaryscan = new Scanner(System.in);
        Scanner decimalscan = new Scanner(System.in);

        int input_result = 0;
        String binaryinput; //holds users binary number
        int decimalinput; //holds users decimal input
 System.out.println(input_result);
        System.out.println(
            "Hello; \nWould you like to convert a Binary Number to a Decimal String? (Y/N)");
        String ynBinary = scan1.next();
        if (ynBinary.toLowerCase().indexOf('y') != -1)
        {
            input_result = 1;
            System.out.println("Ok, please input your Binary String.");
            binaryinput = binaryscan.next();
        }
        else if (ynBinary.toLowerCase().indexOf('n') != -1)
        {
            System.out.println(
                "Would you like to convert a Deciamal String to a Binary Number? (Y/N)");
            String ynDecimal = scan2.next();
    //    }
/////////////////////////////////////BEGIN INTERNAL IF STRUCTURE
        if (ynDecimal.toLowerCase().indexOf('y') != -1)
        {
            input_result = 2;
            System.out.println("Ok, please input your Decimal Number.");
            decimalinput = decimalscan.nextInt();
        }
        else if (ynDecimal.toLowerCase().indexOf('n') != -1)
        {

            System.out.println(
                "Sorry, but looks like this program is not for you!");
        }
        else
        {
            System.out.println("Your input is invalid!");
        }
        }
/////////////////////////////////////END INTERNAL IF STRUCTURE
        else
        {
            System.out.println("Your input is invalid!");
        }


            System.out.println(" \n");
          
    //      	System.out.println("input_result = " + input_result);
          	
          	if (input_result == 1) {
          	System.out.println("Your Binary Input was: " + input_result);
          	// 	BINARY TO DECIMAL = 1

////////////////////METHOD CALL HERE//////////////////////////
            
          	System.out.println("Your Resulting Decimal Number is:" + input_result);
          	}
				else if (input_result == 2) {
					System.out.println("Your Decimal Input was: " + decimalinput);
          	// DECIMAL TO BINARY = 2
////////////////////METHOD CALL HERE//////////////////////////

          	String binaryreturn = convertdecimal.decimalbinaryconvert(decimalinput);
          	
          	System.out.println("Your Resulting Binary Number is: " + binaryreturn);
          	}
          	else {
          	System.out.println("There has been an error! please try again.");
          	}
    }
 
     
}