A-LevelComputer ScienceProgramming9618/21 · May/June 2024 · Q46 Marks
A global 1D array Data contains 100 elements of type integer. A function Check() will: • total the element values in odd index locations (1, 3, 5 ... 97, 99) • total the element values in even index locations (2, 4, 6 ... 98, 100) • return one of three strings 'Odd', 'Even' or 'Same' to indicate which total is the greater, or whether the totals are the same. Write pseudocode for the function Check().
- A global 1D array Data contains 100 elements of type integer. A function Check() will: • total the element values in odd index locations (1, 3, 5 ... 97, 99) • total the element values in even index locations (2, 4, 6 ... 98, 100) • return one of three strings 'Odd', 'Even' or 'Same' to indicate which total is the greater, or whether the totals are the same. Write pseudocode for the function Check().[6]
Mark scheme
Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.
- [6] Example:
- FUNCTION Check() RETURNS STRING
- DECLARE Odd, Even, Index : INTEGER
- Odd ← 0
- Even ← 0
- FOR Index ← 1 TO 100
- IF Index MOD 2 = 0 THEN
- Even ← Even + Data[Index]
- ELSE
- Odd ← Odd + Data[Index]
- ENDIF
- NEXT Index
- ENDFUNCTION
- Mark as follows:
- 1. Function heading, ending and return type
- 2. Declare local variables Odd, Even and Index as integers
- 3. Initialise Odd and Even
- 4. Loop for 100 iterations // through array
- 5. Sum Odd and Even element values in a loop
- 6. Compare Odd and Even after the loop and Return appropriate string
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