B. Using Structures and files: Create a C++ program for Employee record system. Note that: program must be menu driven, allowing the user to select an operation: add employee record, show existing employees' records, update employee record, and delete employee record. The program must consist of following functions: 1. Function showChoice: The function shows the options to the user and explains how to enter data. 2. Function addRecord: The function adds new employee record. 3. Function showRecords: The function shows all employees' records. 4. Function updateRecord: The function updates the information of specific employee. 5. Function deleteRecord: The function delete a specific employee record. 6. Function ExitProg: The function terminates the program execution. P.S. Employee information is: Employee ID. Name, Age, and Salary

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