A train runs from the airport to the city centre - Edexcel - GCSE Computer Science - Question 5 - 2020 - Paper 1
Question 5
A train runs from the airport to the city centre. Passengers purchase tickets from a ticket machine at the station. Journeys must start within two hours of purchasin... show full transcript
Worked Solution & Example Answer:A train runs from the airport to the city centre - Edexcel - GCSE Computer Science - Question 5 - 2020 - Paper 1
Step 1
Input: Current time
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Answer
To calculate the expiry time, the current time is used as the starting point. The expiry time is then determined by adding a set duration (e.g., 2 hours) to the current time.
Step 2
Process: Calculate expiry time
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The expiry time is calculated using the formula:
ExpiryTime=CurrentTime+2exthours
This ensures that the ticket remains valid for two hours from the time of purchase.
Step 3
Output: Expiry time
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The output is the calculated expiry time, which shows the time until the ticket expires, allowing passengers to plan their journey accordingly.
Step 4
Input: Payment
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The payment process involves receiving coins and notes from the user. The input is validated to ensure the correct amount is received.
Step 5
Process: Ticket
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Once the payment has been validated and processed, a ticket is generated and printed for the user. The machine also calculates the change to be returned based on the payment provided.
Step 6
Output: Change
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The output is the amount of change that the user receives after the ticket purchase, ensuring that the transaction is completed correctly.
