Suppose the CashRegister needs to support a method void undo() that undoes the addition of the preceding
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Suppose the CashRegister needs to support a method void undo() that undoes the addition of the preceding item. This enables a cashier to quickly undo a mistake. What instance variables should you add to the CashRegister class to support this modification?
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Instance variables are declared in a class but outside a method constructor or any block When space ...View the full answer
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