AQA · GCSE · Computer Science · Higher

C# function for counting visitor days

Q14.2 6 marks

Using C#, write a subroutine to help a museum review the number of visitors in a month.

have the identifier countDays
have the number of days a museum was open in the last month as a parameter
get the user to enter the number of visitors to the museum for each of those days
count how many of those days the museum had more than 200 visitors
return the count

You should use meaningful variable name(s) and C# syntax in your answer.

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Marking points

1 Uses a definite iteration structure to process the specified number of days.
2 Uses selection to test each visitor number.
3 Correctly defines countDays with the number of open days as a parameter.
4 Inputs one visitor number for each day using correct iteration boundaries.
5 Initialises the counter to 0 and increments it only when visitors are greater than 200.
6 Returns the calculated counter rather than only displaying it.

Full-mark answer

static int countDays(int days) { int count = 0; for (int i = 0; i < days; i++) { int visitors = Convert.ToInt32(Console.ReadLine()); if (visitors > 200) { count = count + 1; } } return count; }

Why this answer loses marks

I looped through the inputs, counted matching days and displayed the count.

The task requires a named parameterised subroutine that returns the count; displaying it is not the same as returning it.

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