2018 New Spec

Question 3

The algorithm, represented using pseudo-code in Figure 2, outputs a series of numbers. The contents of the series depends on the initial value entered by the user.

Figure 2

Number ← 0
WHILE (Number < 1) OR (Number > 10)
   OUTPUT "Enter a positive whole number: "
   INPUT Number
   IF Number > 10 THEN
      OUTPUT "Number too large."
   ELSE
      IF Number < 1 THEN
         OUTPUT "Not a positive number."
      ENDIF
   ENDIF
ENDWHILE
c ← 1
FOR k ← 0 TO Number – 1
   OUTPUT c
   c ← (c * (Number - 1 – k)) DIV (k + 1)
ENDFOR

The DIV operator calculates the result of an integer division, for example, 10 DIV 3 = 3. What you need to do:

Task 1

Write a program to implement the algorithm in Figure 2.

Task 2

Test the program by showing the result of entering:

• -3
• then 11
• then 10