Passengers are counted as they go through the security barriers - Edexcel - GCSE Computer Science - Question 9 - 2020 - Paper 1

Initialize Count: Begin by setting the count for each barrier in the array counts. Each inner array corresponds to a barrier and has two elements: the barrier number and the count.

Retrieve inBarrier: Determine which barrier has been signaled and stored in the variable inBarrier.

Increment Count:

• Use a for loop to iterate through the counts array.

• Check if the current index matches inBarrier.

• If a match is found, increment the count for that barrier. This can be done using:

  counts[i][1] = counts[i][1] + 1;
  

Complete Loop: Exit the loop once the count for the relevant barrier has been incremented. There is no need to continue checking other barriers once a match is found.

End of Algorithm: End the process once the count has been successfully updated.