A-LevelComputer ScienceProgramming9618/22 · May/June 2022 · Q67 Marks
A string represents a series of whole numbers, separated by commas. For example: "12,13,451,22" Assume that: • the comma character ',' is used as a separator • the string contains only the characters '0' to '9' and the comma character ','. A procedure Parse will: • take the string as a parameter • extract each number in turn • calculate the total value and average value of all the numbers • output the total and average values with a suitable message.
- (a)Write pseudocode for the procedure. PROCEDURE Parse(InString : STRING) ENDPROCEDURE[7]
Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [7] Marks as follows:
- 1 Declare and initialise Count, Total and NumString
- 2 Loop for number of characters in InString
- 3 Extract a character and test for comma in a loop
- 4 If comma, convert NumString to integer and update Total and Count
- 5 and reset NumString
- 6 Otherwise append character to NumString
- 7 Calculate average AND final output statement(s) outside the loop
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