// file:    BankAccount.java
// author:  Robert Keller
// purpose: A first Java program, defining a bank account.


/**  
  *  BankAccount defines one bank account.
  */

class BankAccount
{
private int balance;            // this account's balance

private int number;             // account number

String owner;                   // name of account owner

String owner_ss_no;             // owner's social security number

static int last_acct = 0;       // account number counter


/**
     Constructor for a bank acount
 **/

public BankAccount(String owner, String owner_ss_no, int initial_balance)
  {
  this.owner = owner;
  this.owner_ss_no = owner_ss_no;
  balance = initial_balance;
  number = ++last_acct;
  }


/**
     Make a deposit of a specified amount
 **/

public void deposit(int amount)
  {
  balance += amount;            
  }


/**
     Try to make a withdrawal of a specified amount.
     Return true if this was possible, false otherwise. 
 **/

public boolean withdraw(int amount)
  {
  if( amount > balance )
    return false;		// unsuccessful
  balance -= amount;		// successful
  return true;
  }


/**
     Print a statement for the account.
 **/

public void statement()
  {
  System.out.println("Balance in account number " + number + " is " + balance);
  }


/**
     Close the account.
 **/

public void close()
  {
  balance = 0;
  }


/**
     BankAccount test program.
 **/

public static void main(String args[])
  {
  // declare accounts
  BankAccount a, b, c;

  // create accounts
  a = new BankAccount("Alice", "991",  15000);
  b = new BankAccount("Wei",   "995", 200000);
  c = new BankAccount("Helga", "998", 100000);

  // use accounts
  b.deposit(5000);
  c.deposit(50000);

  if( !a.withdraw(5000) )
    {
    System.out.println("Insufficient funds in " + a.number);
    }

  if( !a.withdraw(11000) )
    {
    System.out.println("Insufficient funds in " + a.number);
    }

  // print statements
  a.statement();
  b.statement();
  c.statement();
  }
}