// File: DynamicExample16.java
//
// Author: Rahul Simha
// Created: Sept 2, 1998.
// Modified: Sept, 2008
//
// Doing a comparison externally.

class Customer {
  String custName;
  int bankBalance;

  // A function to be called by all constructors:
  void setupData (String cname, int balance)
  {
    // ... test that cname is not null
    // and has valid chars ...
    custName = cname;

    // ... test that balance is positive
    // and within limits...
    bankBalance = balance;      
  }

  public Customer (String cname, int balance)
  {
    setupData (cname, balance);
  }

  public Customer ()
  {
    setupData ("XXXinvalidcustXXX", 0);
  }

  public Customer (String cname)
  {
    setupData (cname, 0);
  }

  public void printInterest (double percentageRate)
  {
    double interest = (percentageRate / 100) * bankBalance;
    System.out.println ("Customer " + custName + " gets " + interest + 
                        " dollars in interest");
  }

  public String toString ()
  {
    return ("Name=" + custName + ", Balance=" + bankBalance);
  }

  // Accessors
  public String getCustName ()
  {
    return custName;
  }

  public int getBalance ()
  {
    return bankBalance;
  }
}

public class DynamicExample16 {

  static int compare (Customer c1, Customer c2)
  {
    int b1 = c1.getBalance();
    int b2 = c2.getBalance();

    double ratio = (double) b1 / (double) b2;

    // Comparable if within same order of magnitude.
    if ( (0.1 < ratio) && (ratio < 10) )
      return 0; 
    else if (b1 < b2)
      return -1;
    else
      return 1;
  }

  public static void main (String[] argv)
  {
    Customer c1 = new Customer ("Bill G", 1000000);
    Customer c2 = new Customer ("Larry E", 100000);

    int comp = compare (c1, c2);
    if (comp < 0)
      System.out.println ("c2 is richer");
    else if (comp > 0)
      System.out.println ("c1 is richer");
    else 
      System.out.println ("same balance");

  }
}