public class BankAccount
{
   public int accNum;
   public String name;
   public double balance;


   /* ==============================================
      convToString(x): return a String containing
                        information of BankAccount x
      ============================================== */
   public static String convToString( BankAccount x )
   {
      return( "Account number: "  + x.accNum 
                + ", Name: "  + x.name
                + ", Balance: " + x.balance);
   }

   /* ==============================================
      deposit(x, amount): Add "amount" to x.balance
      ============================================== */
   public static void deposit( BankAccount x, double amount )
   {
      x.balance += amount;
   }


   /* ======================================================
      withdraw(x, amount): Subtract "amount" from x.balance
      ====================================================== */
   public static void withdraw( BankAccount x, double amount )
   {
      if ( x.balance >= amount )
         x.balance -= amount;   // Subtract "amount" from x.balance
   }
}