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The Music Chart Company has contacted you to help them create a program that will display the most popular songs and determine the ranking of new songs - NSC Information Technology - Question 4 - 2024 - Paper 1

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The Music Chart Company has contacted you to help them create a program that will display the most popular songs and determine the ranking of new songs. Do the foll... show full transcript

Worked Solution & Example Answer:The Music Chart Company has contacted you to help them create a program that will display the most popular songs and determine the ranking of new songs - NSC Information Technology - Question 4 - 2024 - Paper 1

Step 1

4.1 - Sort

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Answer

To implement the sorting functionality for button [4.1 - Sort], follow these steps:

  1. Initialize Loop Variables: Begin by defining a loop variable I which iterates from 1 to length(arrPosition) - 1.

  2. Nested Loop: Inside the first loop, initialize a second loop with variable J, iterating from 1 to length(arrPosition).

  3. Condition Check: In this nested loop, check if arrPosition[I] > arrPosition[J]. If so, execute the following steps:

    • Store the value of arrPosition[J] in a temporary variable Temp.
    • Swap the positions: set arrPosition[I] to arrPosition[J] and arrPosition[J] to Temp.

  4. Update arrSongs: After swapping the positions in arrPosition, update arrSongs. Store the value of arrSongs[I] in a temporary variable sTemp, then set arrSongs[I] to arrSongs[J] and arrSongs[J] to sTemp. This ensures that the songs are also sorted in alignment with their positions.

  5. End Loops: Finally, make sure both loops are properly closed.

Step 2

4.2 - New chart

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Answer

To display the updated chart for button [4.2 - New chart], follow these steps:

  1. Display Headings: Set the heading for 'Song', 'Position', and 'Movement' in red color in the appropriate GUI element redQ4.

  2. File Handling: Use AssignFile to access 'Top20.txt' and call Reset(File) to prepare it for reading.

  3. Initialize Movement Logic: Start a loop from J = 0 to 20. Inside this loop:

    • Read each song from 'Top20.txt'.
    • Initialize a counter and a flag variable.
    • If the song from the text file appears in arrSongs, increment the counter and determine the movement:
      • If the song's current position is greater than its previous position, indicate 'UP'.
      • If the position is lower, indicate 'DOWN'.
      • If it remains the same, indicate 'SAME POSITION'.
    • If the song is not found, set the flag to false.

  4. Display Results: Finally, display each song, its position, and its movement in redQ4.

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