Programming fundamentals

Programming fundamentals

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Question 4

An automated greenhouse irrigation system controls watering zones. Each zone has a specific code, as shown in the table below:

Code	Zone Type
NT	North Tunnel
ST	South Tunnel
HP	Hydroponics

A program is written to update irrigation settings. The program:

displays an initialising message
asks the user to enter the zone code
calls the prewritten function CheckZoneValid() to check whether the entered code is valid
if valid, asks the user to input the target soil moisture percentage, combines them to form a control command, and calls a procedure QueueCommand()

01  print("Irrigation System Controller v2.1")
02  zoneCode = input("Enter zone code: ")
03  isValid = CheckZoneValid(zoneCode)
04  if (isValid == true) then
05      targetMoisture = input("Enter target soil moisture percentage: ")
06      controlCommand = zoneCode + ":" + targetMoisture
07      QueueCommand(controlCommand)
08  endif

Give the line number that contains the call to the prewritten validation function.

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