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Write code to add the column (arrtimes) and row headings (arrdoctors) - NSC Information Technology - Question 3 - 2017 - Paper 1
Question 3
Write code to add the column (arrtimes) and row headings (arrdoctors). The current patients’ names are stored in a text file, patients.txt. Extract the names and st... show full transcript
Worked Solution & Example Answer:Write code to add the column (arrtimes) and row headings (arrdoctors) - NSC Information Technology - Question 3 - 2017 - Paper 1
Step 1
FORMCREATE Row Headings (appointment times) and Column Headings (doctor names)
Answer
To create the two-dimensional array for the appointments, first, check if the file 'patients.txt' exists. If not, display a message and handle accordingly.
Set up the 2D array named 'ar2appointments' with the appropriate class scope.
Read the first line of the 'patients.txt' file to extract the doctors' names, storing them in the first row of the array. Then, loop through the remaining lines to read patients' names. For each patient, store their name in the appropriate row of the array, while looping through the available time slots using a double loop structure.
Each time slot (column) should correspond to specific appointment times, and properly filling the array is essential for further operations. Finally, call a method to display the content of the 2D array.
Step 2
INSERT METHOD
Answer
The 'Insert' method should take the patient's name and doctor number as parameters.
Inside the method, generate a random number between 1 and 10 to designate the appointment slot. If the doctor number is between 1 and 4, check if that specific doctor has an opening. If they do, assign the patient to that time slot in the 2D array. If they don't, randomize a new time slot for that specific doctor.
If the doctor number is 5, allocate the patient to any doctor randomly by again checking availability and assigning them an appointment time based on the random number generated.
Step 3
ADD APPOINTMENT BUTTON
Answer
When the patient enters their preferred doctor’s number, retrieve this information and use another InputBox to enter the patient's name and surname.
Invoke the 'Insert' method with the gathered data and subsequently update the display method to reflect the newly added appointment in the string grid.
Step 4
CHANGE APPOINTMENT BUTTON
Answer
Show an InputBox for the patient to enter their name and surname.
Search the 2D array for the patient's details. If found, call the 'Insert' method, providing the updated details. Prior to this, ensure you delete the original appointment corresponding to the patient from the array to maintain accuracy.
Lastly, display the updated array to confirm changes.
Step 5
Step 6
DOCTOR WALK-IN BUTTON
Answer
To handle walk-in patients, first, initialize a variable to track the minimum number of appointments. Iterate over the array, checking each doctor’s appointment count.
Find the doctor with the least appointments and indicate this doctor as available for walk-ins.
Display a message indicating the doctor’s name along with their appointment details, making it clear who is available for walk-in patients.