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

Initialize a flag variable and set it to False. This will be used to track whether a direct route is found.

Iterate through each line of the file to check for the presence of the towns.

Within the loop, check if both the town of departure and the destination town are found in the line of text. Ensure they are not the same town.

If both towns are found, locate the positions of the '#' and '*' characters in the line. These will help extract the distance and mountain pass information.

Using the positions found, extract the distance between the two towns from the line of text.

Determine if a mountain pass exists based on the data extracted. If it does, display a 'Pass on route' message; otherwise, display a 'No pass' message.

If a route is found (i.e., flag is True), display the distance and whether there is a mountain pass.

If the flag remains False after looping through the file, display a message indicating that no possible route was found.

Finally, ensure the file is properly closed to free up resources.