Direct routes:
The GUI allows the user to select the town of departure and the destination town from the combo boxes provided - NSC Information Technology - Question 3 - 2016 - Paper 1
Question 3
Direct routes:
The GUI allows the user to select the town of departure and the destination town from the combo boxes provided.
Use the Q3Data.txt file to determine... show full transcript
Worked Solution & Example Answer:Direct routes:
The GUI allows the user to select the town of departure and the destination town from the combo boxes provided - NSC Information Technology - Question 3 - 2016 - Paper 1
Step 1
Open the text file to read from file
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Answer
To start, we need to open the Q3Data.txt file which contains the data about the towns and routes.
Step 2
Set flag to False
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Initialize a boolean flag to False. This will be used to determine if a direct route exists.
Step 3
Loop through the file
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Answer
Iterate through each line in the file to check for the presence of the towns.
Step 4
Test if town of departure AND destination has been found
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Answer
Check if both the town of departure and destination are present in the current line of text, ensuring they are not the same.
Step 5
Find position of ‘#’, Find position of ‘*’
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Answer
Locate the positions of the special characters '#' and '*' in the line to extract relevant information.
Step 6
Extract the Distance from the line of text
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Answer
Using the positions found, extract the distance between the two towns.
Step 7
Test if mountain pass exists
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Answer
Check if the text indicates a mountain pass. If it does, display a message indicating so.
Step 8
Display all information regarding the route
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If a direct route exists, output the distance and whether there is a mountain pass. If not, set the flag to False and prepare a message.
Step 9
If flag is False, Display message 'Not Found'
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If no valid route is found after checking all entries, display a message stating that no possible route exists.
Step 10
Close File
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Finally, make sure to properly close the file after reading to prevent memory leaks.
