Introduction - If you have any usage issues, please Google them yourself
Section 7.6.2 to complete the calculation of employees' wages to expand the program, employees will generally subdivided into time employees (DailyWorker) and piece-rate employees (PieceWorker) categories, time wage employees by day, and their production of piece-rate wages Product Number calculating wages. Please design of these two classes, and programs and procedures 7.11 to 7.13 together, and then write a similar program 7.14 demo program that demonstrates the usage of these classes.