A shipping program, ShipClassify, categorizes packages according to weight limits in grams.
Here is the pseudo-code for an algorithm that determines the delivery category of a package.
1 SET weightThresholds TO [100, 250, 500, 1000]
2 SET shippingCategory TO ["Standard", "Express", "Priority", "Overnight", "Heavy Freight"]
3 SET sorted TO False
4 SET index TO 0
5
6 SEND "Enter package weight in grams" TO DISPLAY
7 RECEIVE weight FROM (INTEGER) KEYBOARD
8
9 WHILE (sorted = True) AND (index < LENGTH(weightThresholds)) DO
10 IF (weight > weightThresholds[index]) THEN
11 SET index TO index + 1
12 ELSE
13 SET sorted TO True
14 END IF
15 END WHILE
16 SEND shippingCategory[index] TO DISPLAY
The pseudo-code produces an incorrect output.
When the user enters 350, the algorithm outputs "Standard". The correct output should be "Priority".
State the name for this type of error.
159 exam-style questions on Edexcel GCSE Computer Science Algorithms, covering Constructs for solving problems, Variables, constants and data structures, Arithmetic, relational and logical operators, Tracing algorithm output with trace tables, Types of error and correcting logic errors, Standard algorithms (sorts and searches), and Evaluating algorithm fitness and efficiency. Each one has a worked solution and a mark scheme showing where the marks go.