36 lines
700 B
Lua
36 lines
700 B
Lua
-- account.lua
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-- from PiL 1, Chapter 16
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Account = {balance = 0}
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function Account:new (o, name)
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o = o or {name=name}
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setmetatable(o, self)
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self.__index = self
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return o
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end
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function Account:deposit (v)
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self.balance = self.balance + v
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end
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function Account:withdraw (v)
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if v > self.balance then error("insufficient funds on account "..self.name) end
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self.balance = self.balance - v
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end
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function Account:show (title)
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print(title or "", self.name, self.balance)
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end
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a = Account:new(nil,"demo")
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a:show("after creation")
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a:deposit(1000.00)
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a:show("after deposit")
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a:withdraw(100.00)
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a:show("after withdraw")
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-- this would raise an error
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b = Account:new(nil,"DEMO")
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b:withdraw(100.00)
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