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Hikers use a distance chart to plan their hiking trips - NSC Information Technology - Question 4 - 2021 - Paper 1
Question 4
Hikers use a distance chart to plan their hiking trips. Checkpoints refer to rest areas or overnight locations on a hiking trail. A distance chart consists of the di... show full transcript
Worked Solution & Example Answer:Hikers use a distance chart to plan their hiking trips - NSC Information Technology - Question 4 - 2021 - Paper 1
Step 1
Button - [4.1 – Display distance chart]
Answer
To display the distance chart, we need to loop through the array of checkpoints and create a formatted string that contains both the names and the corresponding distances.
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Loop through checkpoints:
- Use a loop that iterates from 1 to 5 for the rows.
- Within that loop, initiate another loop that also goes from 1 to 5 for the columns.
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Build the output string:
- For each checkpoint, append its name using
arrNames[i]to the output string. - Test the distance using
arrDistances[i][j], ensuring you cross-check each distance.
- For each checkpoint, append its name using
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Display the output:
- Finally, output the complete string in a rich edit component.
Step 2
Button - [4.2 – Validation]
Answer
The validation step involves checking the distances and ensuring they are accurately represented within the provided limits.
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Loop through the arrays:
- Use a loop structure from 1 to 5 to iterate through both rows and columns.
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Test the distances:
- For each index, check if the distance at
arrDistances[i][j]is not equal toarrDistances[j][i]and build the output string accordingly. - Include conditions to validate if distances are logical/equal.
- For each index, check if the distance at
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Display the output string:
- Once the loop completes, display the resultant output string.
Step 3
Button - [4.3 – Route planner]
Answer
The route planner will involve extracting and calculating route distances based on user input.
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Extract the route from the combo box:
- Obtain the user's selected route and initialize a variable for total distance.
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Loop through combinations:
- Create nested loops to generate all possible combinations of checkpoints, allowing dynamic route setup.
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Calculate distances:
- Use previous distance functions to compute and sum distances between the selected checkpoints, displaying calculations in real-time.
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Display summary:
- Finally, retrieve and display total distances and checkpoint information through the GUI.