206 lines
9.7 KiB
Python
206 lines
9.7 KiB
Python
# specimen Cambridge iGCSE Computer Science prerelease
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def prerelease_047802_specimen():
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# define lists for all required data
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student_names = []
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test_1_marks = []
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test_2_marks = []
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test_3_marks = []
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total_marks = []
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# define number of students to record data for
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number_of_students = 30
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# define variable for storing total marks gained by all students overall
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sum = 0
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# function for prompting user for input, then checking it against conditions
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def getMark(test_number, student_index, max_mark):
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# keep asking for the mark until a valid mark is entered
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mark = None
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while not mark:
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# ask for mark of given student, for given test number
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mark = input("%s test %d mark: " % (student_names[student_index], test_number))
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# check if mark is given and that it's numeric
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if (mark and mark.isnumeric()):
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# check mark is in acceptable range of values
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if (int(mark) < 0 or int(mark) > max_mark):
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mark = None
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else:
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mark = None
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# if input is invalid, print error message
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if not mark:
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print("Invalid input. Please enter a number between 0 and %d." % max_mark)
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# return mark
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return int(mark)
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# do this for all students
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for i in range(number_of_students):
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# retrieve and store student's name
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student_names.append(input("Student %d name: " % (i + 1)))
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# do this for all students
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for i in range(number_of_students):
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# retrieve and store student's test marks
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# test #1 has a max mark of 20
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test_1_marks.append(getMark(1, i, 20))
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# test #2 has a max mark of 25
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test_2_marks.append(getMark(2, i, 25))
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# test #3 has a max mark of 35
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test_3_marks.append(getMark(3, i, 35))
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# record student's total marks
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total_marks.append(test_1_marks[i] + test_2_marks[i] + test_3_marks[i])
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# add student's total marks to sum of all marks gained by all students overall
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sum += total_marks[-1]
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# print each student's total marks
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for i in range(number_of_students):
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print("%s: %d" % (student_names[i], total_marks[i]))
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# print average total for all students
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print("Average total: %.2f" % (sum / 30))
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# 2020 Cambridge iGCSE Computer Science prerelease (India)
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def prerelease_047822_india_2020():
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# ask which base model user wants
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print("Which model?")
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print("(1) Hackback - Rs 5.35 Lakh")
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print("(2) Saloon - Rs 4.95 Lakh")
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print("(3) Estate - Rs 6.25 Lakh")
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# keep asking until valid input is entered
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model = None
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while not model:
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# ask for choice
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model = input()
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# if input isn't a number, display error
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if (not model.isnumeric()):
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model = print("Invalid input. Please enter a number between 1 and 3.")
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model = None
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# if input is a number outside valid range, display error
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elif (int(model) < 1 or int(model) > 3):
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model = print("Invalid input. Please enter a number between 1 and 3.")
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model = None
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# get cost of chosen base model
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model_costs = [535000, 495000, 625000]
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cost = model_costs[int(model) - 1]
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# ask which optional extras user wants
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print("Optional extras:")
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print("(1) Set of luxury seats - Rs 45000")
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print("(2) Satellite navigation - Rs 5500")
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print("(3) Parking sensors - Rs 10000")
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print("(4) Bluetooth connectivity - Rs 350")
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print("(5) Sound system - Rs 1000")
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# ask for input, remove duplicated characters and remove non-numerical characters
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optional_extras = "".join(char for char in "".join(set(input("Please enter the numbers of the optional extras you would like. Invalid options will be ignored: "))) if char.isdigit())
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# remove numbers outside of valid range
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optional_extras = "".join(char for char in optional_extras if 0 < char < 6)
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# add costs of chosen optional extras to total cost
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optional_extra_costs = [45000, 5500, 1000, 350, 1000]
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optional_extras_cost = 0
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for number in optional_extras:
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cost += optional_extra_costs[int(number) - 1]
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optional_extras_cost += optional_extra_costs[int(number) - 1]
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# ask if user is an existing customer
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existing_customer = input("Are you an existing customer (y/n)? ").lower()
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# evaluate input to boolean
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existing_customer = True if (existing_customer[0] == "y" or existing_customer[-1] == "s") else False
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# ask if user has car to trade in
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car_trade = input("Do you have a car to trade in (y/n)? ").lower()
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# evaluate input to boolean
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if (car_trade[0] == "y" or car_trade[-1] == "s"):
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car_trade = True
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# keep asking for trade-in amount until valid input entered
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trade_amount = None
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while (not trade_amount):
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# ask for input
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trade_amount = input("How much have Snazzy Autos offered for your car (Rs)? ")
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# if input isn't a number, display error
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if (not trade_amount.isnumeric()):
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print("Invalid input. Please enter a number.")
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trade_amount = None
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# if input is a number outside of the acceptable range, display an error
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elif (trade_amount <= 0):
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print("Invalid input. Please enter a number above 0.")
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trade_amount = None
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else:
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car_trade = False
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# display total cost without discounts
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print("Cost: Rs %.2f" % cost)
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# calculate discount: 10% if existing customer and 5% if car isn't being traded in
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discount = (cost * 0.1 if existing_customer else 0) + (cost * 0.05 if not car_trade else 0)
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# display total discount
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print("Discount: Rs %.2f" % discount)
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# if car is traded in, print trade-in amount
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if car_trade: print("Trade-in amount: Rs %.2f" % trade_amount)
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# print total cost
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print("\nTotal cost: Rs %.2f" % (cost - discount - trade_amount))
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# ask which payment option user wants
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print("Which payment option would you like?")
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cashback = cost * 0.01
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if (cashback > optional_extras_cost):
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print("(1) Pay full amount now - 1% \cashback - total cost Rs %.2f - one payment - including cashback of Rs %.2f | or free optional extras - total cost %.2f - one payment - including discount of %.2f" % (cost * 0.99, cashback, cost - optional_extras_cost, optional_extras_cost))
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else:
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print("(1) Pay full amount now - free optional extras - total cost %.2f - one payment - including discount of %.2f | or 1% \cashback - total cost Rs %.2f - one payment - including cashback of Rs %.2f" % (cost - optional_extras_cost, optional_extras_cost, cost * 0.99, cashback))
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print("(2) Monthly payements for four years - no charge - total cost Rs %.2f - payments of Rs %.2f - 48 payments" % (cost, cost / 48))
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print("(3) Monthly payments for seven years - 5% \charge - total cost Rs %.2f - payments of Rs %.2f - 80 payments" % (cost * 1.05, cost * 1.05 / 84))
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# keep asking until valid input entered
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payment_option = None
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while (not payment_option):
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# ask for input
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payment_option = input()
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# if input isn't a number, display error
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if (not payment_option.isnumeric()):
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print("Invalid input. Please enter a number.")
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payment_option = None
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# if input is a number outside acceptable range, display error
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elif (not 0 < int(payment_option) < 4):
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print("Invalid input. Please enter a number between 1 and 3.")
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payment_option = None
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# calculate total cost, adjusted for chosen payment option
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if (payment_option == 3):
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cost *= 1.05
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# ask user if they want 1% cashback or free optional extras if they pay upfront
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if (payment_option == 1):
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print("Which option would you like?")
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if (cashback > optional_extras_cost):
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print("(1) Cashback - save Rs %.2f" % cashback)
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print("(2) Free optional extras - save Rs %.2f" % optional_extras_cost)
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else:
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print("(1) Free optional extras - save Rs %.2f - total cost Rs %.2f" % (optional_extras_cost, cost - optional_extras_cost))
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print("(2) Cashback - save Rs %.2f - total cost Rs %.2f" % (cashback, cost * 0.99))
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# keep asking until valid input entered
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cashback_or_free_extras = None
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while (not cashback_or_free_extras):
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cashback_or_free_extras = input()
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# if input isn't a number, display error
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if (not cashback_or_free_extras.isnumeric()):
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print("Invalid input. Please enter a number.")
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cashback_or_free_extras = None
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# if input is number outside of acceptable range, display error
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elif (not 0 < cashback_or_free_extras < 3):
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print("Invalid input. Please enter either 1 or 2.")
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cashback_or_free_extras = None
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# calculate total cost and store order discount message
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if ((cashback > optional_extras_cost and cashback_or_free_extras == 1) or (cashback <= optional_extras_cost and cashback_or_free_extras == 2)):
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cost = cost * 0.99
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order_message = "1% \cashback of Rs %.2f" % cashback
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else:
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cost = cost - optional_extras_cost
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order_message = "free optional extras (Rs %.2f)" % optional_extras_cost
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# store order discount message
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if payment_option == 2:
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order_message = "no discount"
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elif payment_option == 3:
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order_message = "5% price increase of Rs %.2f" % cost / 1.05 * 0.05
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# print order summary
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print("\nOrder summary:")
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print("Total cost: Rs %.2f - with %s" % (cost, order_message))
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payments_number = [1, 48, 80]
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print("%d payment(s) of Rs %.2f" % (payments_number[payment_option], cost / payments_number[payment_option]))
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