Sentnel and Priming input for Calculator.txt

Question 2: modify the average calculator into indefinite loops
			one with setinel values
			one with priming input
part 1C
start
	//Declarations of variables
	num STUDENT_SCORES[] = new num[3]
	num index = 0
	num SIZE = 3
	num total = 0
	num DIVISOR = 3
	num average = 0
	num QUIT = "XXX"
	string userChoice
	
	//Prompt the user to enter values
	if (userChoice <> QUIT ) then
		do
			for index = 0 to (SIZE - 1) step 1
		
				output "Please enter the student's score:"
				input STUDENT_SCORES[index], index++
		
				//Calculate the total of all scores
				total = STUDENT_SCORES[index] + total
			endfor
		
			//Calculate the average
			set average = total / DIVISOR
	
			output "The average of the class is:"
			output average	
		
			//Reprompt user to choose to continue
			output "Do you wish to continue entering another set of score, type XXX if no:"
			input userChoice
	
		while (index < SIZE) then
	
	else
		output "Thank you for your answer, Goodbye."
	endif
	
stop

part 1D
start
	//Declarations of variables
	num STUDENT_SCORES[] = new num[3]
	num index = 0
	num SIZE = 3
	num total = 0
	num DIVISOR = 3
	num average = 0
	string userChoice
	
	//Prompt user to start the program or not 
	output "Do you wish to start the program, type YES or NO if: "
	input userChoice
	
	//Prompt the user to enter values
	while (userChoice == "YES") then
		for index = 0 to (SIZE - 1) step 1
		
			output "Please enter the student's score:"
			input STUDENT_SCORES[index], index++
		
			//Calculate the total of all scores
			total = STUDENT_SCORES[index] + total
			
		endfor
		
		//calculate the average
		set average = total / DIVISOR
	
		output "The average of the class is:"
		output average	
		
		//Reprompt user to choose to continue
		output "Do you wish to continue entering another set of score, type YES or NO:"
		input userChoice
		
	endwhile
	
	if (userChoice == "NO") then
		output "Thank you for your answer, Goodbye."
	endif
	
stop