A function GetNum() will: 1. take two parameters: a string and a character 2. count the number of times that the character occurs in the string 3. return the count. Any comparison between characters needs to be case sensitive. For example, character 'a' and character 'A' are not identical. Write pseudocode for function GetNum().

Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

1. [6] FUNCTION GetNum(ThisString : STRING, ThisChar : CHAR) RETURNS INTEGER DECLARE Index, Count : INTEGER Count ← 0 FOR Index ← 1 TO LENGTH(ThisString) IF MID(ThisString, Index, 1) = ThisChar THEN Count ← Count + 1 ENDIF NEXT Index RETURN Count ENDFUNCTION Mark as follows: 1 Function heading and end, including parameters and return type 2 Declare local Integers for Index and Count 3 Loop for length of ThisString 4 Extract a character and compare with parameter in a loop 5 Increment Count if match in a loop 6 Return Count after loop