Scottish Highers Computing Science Software Design and Development- Testing: A mathematician has written a pr

Question

A mathematician has written a program to generate the first six numbers in a mathematical sequence. The next number in the sequence is the sum of the previous two numbers. For example, if the sequence starts with
5, 7, . . .
Then the first six numbers of the sequence would be
5, 7, 12, 19, 31, 50

The following code has been developed to generate the sequence of six numbers.

...

Line 10 DECLARE sequence INITIALLY [0,0,0,0,0,0]
Line 11 SET sequence[0] TO 5
Line 12 SET sequence[1] TO 7
Line 13 FOR I FROM 2 TO 5 DO
Line 14 SET sequence[n] TO sequence[n-1] + sequence[n-1]
...

a) A logic error in the code means that an incorrect sequence is generated. The trace table below shows the line numbers where a variable has changed.

Line Number    sequence                     n
10                  [0,0,0,0,0,0]
11                  [5,0,0,0,0,0]
12                  A
13                  B
14                  C

State the missing values at A, B and C.

A.

B.

C.

b) Re-write Line 14 of the code to generate the correct sequence.

A mathematician has written a program to generate the first six numbers in a mathematical sequence - Scottish Highers Computing Science - Question 5 - 2022

Worked Solution & Example Answer:A mathematician has written a program to generate the first six numbers in a mathematical sequence - Scottish Highers Computing Science - Question 5 - 2022

A

B

C

Re-write Line 14 of the code to generate the correct sequence.

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