From: takaoueda@...
Date: 2000-12-19T00:40:02+09:00
Subject: [ruby-talk:7582] New to Ruby

I have just started learning Ruby with the book of Thomas and Hunt. The
book is readable, but sample code is often an incomplete program.  So I
am filling the gaps for exercises.  I concocted the following program
for pp 31-32 by trial and error.  Will someone give a better solution to
this cross-word puzzle?  I had to change the local variables checking
and savings to instance variables @checking and @savings.


class Account
  attr_reader :balance
  attr_accessor :balance
  def initialize(name, balance)
    @balance = balance
    @name = name
  end
end

class Accounts
  def initialize
    @checking = Account.new("checking", 2000)
    @savings = Account.new("saving", 1000)
  end
private
  def debit(account, amount)
    account.balance -= amount
  end
  def credit(account, amount)
    account.balance += amount
  end
public
  def transferToSavings(amount)
    print "Checking balance: ", debit(@checking, amount), "  "
    print "Savings balance: ", credit(@savings, amount), "\n"
  end
end

accs = Accounts.new
accs.transferToSavings(300)
accs.transferToSavings(-200)


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