Computer Science · May / June 2025 · Paper 22 · Question 5
0478
As printed in the paper
The question as text
This pseudocode algorithm should allow 500 names of people and their heights to be entered and stored in two one-dimensional (1D) arrays. The name of a person and the height of that person are in the same index in both the and the arrays. The algorithm performs as follows: • at the start, the following data is entered: name of person height of person in cm • the data is stored in the relevant arrays • the heights of the people are totalled • the shortest person is found • at the end, the following is output: name of shortest person height of shortest person average height of all 500 people. ¡¢ £ ¡¢ ¤ ¥¦ § ¨¦© ¦ª «¨¬ «ª®¯ «¨¬ ° ¥¦ ± «ª®¯ ² ¨¦© ¢¡ ¦ª ¨¡ «³´¨ «ª®¯ £ «³´¨ ¦ª ¤ ¨¦© ¦ª µ ¦ª § «¢ ¦ª ¶ ¥¦ ¨ ¥¦ ¦ª ° «ª®¯ ¦ª ± «¢ ² ·¨ ¦ª £ ¡´¨³´¨ ¸¨ ¦ ¸¹ £ ¡´¨³´¨ ¸¨ ¦ º¦ª ¸¹ «ª®¯ ££ ¡´¨³´¨ ¸¨ » ¸¹ ¨¦© ¼
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5(a)[5]
One mark per mark point
Line 01 / DECLARE Names : ARRAY[1:500] OF REALshould be DECLARE Names : ARRAY[1:500] OF STRING
Line 09 / Total ← 100should be Total ← 0
Line 11 / INPUT Names[Index]should be INPUT Names[Counter]
Line 13 / Total ← Counter + Heights[Counter]should be Total ← Total + Heights[Counter]
Line 20 / OUTPUT "The shortest height is ", Heights should be OUTPUT "The shortest height is ", Shortest or OUTPUT "The shortest height is ", Heights[Index] 01 DECLARE Names : ARRAY[1:500] OF STRING02 DECLARE Heights : ARRAY[1:500] OF REAL
03 DECLARE Shortest : REAL
04 DECLARE Total : REAL
05 DECLARE Counter : INTEGER
06 DECLARE Index : INTEGER
07 Shortest ← 500
08 Index ← 0
09 Total ← 0
10 FOR Counter ← 1 TO 500
11 INPUT Names[Counter]
12 INPUT Heights[Counter]
13 Total ← Total + Heights[Counter]
14 IF Heights[Counter] < Shortest
15 THEN
16 Shortest ← Heights[Counter]
17 Index ← Counter
18 ENDIF
19 NEXT Counter
20 OUTPUT "The shortest height is ", Shortest
21 OUTPUT "The shortest person is ", Names[Index] 22 OUTPUT "The average height is ", Total / 500
5(b)[2]
One mark per mark point
MP1 Output statement with correct calculation of average, or use of a variable average.
MP2 Correct use of ROUND function set to 1 decimal place.
For example,
OUTPUT ROUND(Total / 500, 1)
5(c)[4]
One mark per statement, max four
MP1 Declaration of new variable for tallest person / largest value at start of algorithm
MP2 Initialisation of largest variable to a low number e.g. 0
MP3 New selection statement after input of height to compare it with current largest value
MP4 If input of height is larger than current largest variable, it should become the new largest value
MP5 Outside the loop, output the current value of the largest variable.
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