Question Constellation Sign up for free AQA · GCSE · Computer Science · Higher
Comparing record prices in pseudo-code
| Variable | bookName | author | price |
|---|---|---|---|
| [object Object] | [object Object] | [object Object] | [object Object] |
| [object Object] | [object Object] | [object Object] | [object Object] |
Write an algorithm using pseudo-code to display the name of the most expensive book. Compare the price of B1 and B2; output the book name of the most expensive book; output Neither if the books are the same price. The algorithm should work for any values stored in B1 and B2.
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Marking points
- 1 Uses selection capable of handling the three comparison outcomes.
- 2 Compares the price fields with correct conditions.
- 3 Outputs the correct bookName field or Neither on every route.
Full-mark answer
IF B1.price > B2.price THEN OUTPUT B1.bookName ELSEIF B1.price < B2.price THEN OUTPUT B2.bookName ELSE OUTPUT "Neither" ENDIF
Why this answer loses marks
If the first price is greater, output its name; otherwise output the second name.
This sends equal prices down the second-record route instead of providing the required tie outcome.