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Visual Basic 2005 for Programmers: Deitel Developer Series, Second Edition by Harvey M. Deitel - Deitel & Associates, Inc., Paul J. Deitel - Deitel & Associates, Inc.

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11.7. Case Study: Creating and Using Interfaces

Our next example reexamines the payroll system of Section 11.5. Suppose that the company involved wishes to perform several accounting operations in an accounts payable application In addition to calculating the earnings that must be paid to each employee, the company also wants to calculate the payment due on each of several invoices (i.e., bills for goods and services purchased). Though applied to unrelated things (i.e., employees and invoices), both operations have to do with obtaining some kind of payment amount. For an employee, the payment refers to the employee’s earnings. For an invoice, the payment refers to the total cost of the goods and services listed on the invoice. Can we calculate ...

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