Enhance the invoice-printing program by providing for two kinds of line items: One kind describes products that
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Enhance the invoice-printing program by providing for two kinds of line items: One kind describes products that are purchased in certain numerical quantities (such as “3 toasters”), another describes a fixed charge (such as “shipping: $5.00”). Use inheritance. Produce a UML diagram of your modified implementation.
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I prsented here the updated files and higlighted the changes This program demonstrates the invoice classes by printing a sample invoice public class I...View the full answer
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