Programming fundamentals

Programming fundamentals

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Question 21

An automated library book-sorting system uses different hardware components. Each type of component has an identifier code as shown in the table:

Code	Component
RF	RFID Reader
BS	Book Scanner
SG	Sorting Gate

A program is written to initialize and route books through these components. The program:

Prompts the operator to enter the code of the component they want to initialize.
Calls the prewritten function VerifyReaderCode() to check whether the entered code is valid.
Reads a target shelf identifier as input if the code is valid.
Calls the procedure AssignBookToShelf() using a combined assignment key.

01  readerCode = input("Enter reader code to initialize")
02  if (VerifyReaderCode(readerCode)) then
03      shelfNumber = input("Enter target shelf identifier")
04      assignmentKey = readerCode + shelfNumber
05      AssignBookToShelf(assignmentKey)
06  endif

Give the identifier of a variable used in the program.

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