SECTION B
QUESTION 2: OBJECT-ORIENTATED PROGRAMMING
Airlines store details of flights and passengers to assist staff in verifying information promptly - NSC Information Technology - Question 2 - 2017 - Paper 1
Question 2
SECTION B
QUESTION 2: OBJECT-ORIENTATED PROGRAMMING
Airlines store details of flights and passengers to assist staff in verifying information promptly.
Do the fol... show full transcript
Worked Solution & Example Answer:SECTION B
QUESTION 2: OBJECT-ORIENTATED PROGRAMMING
Airlines store details of flights and passengers to assist staff in verifying information promptly - NSC Information Technology - Question 2 - 2017 - Paper 1
Step 1
2.1.1 Constructor:
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Answer
Define the constructor for the class TFlight. Ensure it takes three parameters corresponding to flightNumber, city, and date. Assign these parameters to the respective attributes using the correct data types.
Step 2
2.1.2 Accessor methods:
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Answer
Implement the accessor methods getFlightNumber, getNumPassengers, and getCity. Each should return the appropriate attribute value.
Step 3
2.1.3 increasePassengers method:
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Answer
Define the increasePassengers method to accept an integer parameter. This method should increase the numPassengers attribute by this integer value and ensure it does not exceed a maximum limit.
Step 4
2.1.4 calcPreBooked method:
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Create the calcPreBooked method. This method should return the value of the numPassengers attribute as it represents the passengers booked for the flight.
Step 5
2.1.5 calcPercBooked method:
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Answer
Define calcPercBooked to calculate the percentage of booked passengers. Use the formula: ( \text{Percentage} = \frac{\text{numPassengers}}{\text{maximum capacity}} \times 100 ). Return the calculated percentage.
Step 6
2.1.6 toString method:
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Answer
Implement the toString method to return a string representation of the flight object. Include the flight number, city, date, and number of passengers in the returned string.
Step 7
2.2.1 Button – Extract Flight Details:
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Answer
Create a method to extract flight details from combo box selections. This method should determine the position of the selected flight based on its flight number and copy the related attributes into variables.
Step 8
2.2.2 Button – setNumPassengers:
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Implement the setNumPassengers method for the object. If the specified flight exists, call increasePassengers with the new number of passengers.
Step 9
2.2.3 Button – Calculation of Fully Booked:
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Answer
Calculate the percentage of booked passengers using calcPercBooked. If the percentage exceeds 100%, display a message indicating that the flight is fully booked.
