import javax.swing.*;

class account
{
    // information:
   double balance = 0;
   String owner;
   double interest;
   int pin;

    // operations - "methods" or "functions
    
    public void deposit(double amount)
    {
        balance = balance + amount;
    }

    public void withdraw(double amount)
    {
      if ( (amount < balance) && (amount > 0) )
        balance = balance - amount;
    }

    public double inquiry()
    {
       return balance;
    }

}


public class prog1
{
   public static void main(String[] args)
    {
       account savings = new account();  // objects
       account checking = new account();
      
       savings.deposit(300);
       checking.deposit(200);
       savings.withdraw(50);

       // output
       JOptionPane.showMessageDialog(null,"savings balance is "
          + savings.inquiry());

       System.exit(0);
    }
}