NSC Information Technology GUI components: An import-export company rents o

Question

An import-export company rents out containers to customers who use it to store goods for a specific period of time. Transactions are created between the company and the customers to keep track of the containers that have been rented out. Do the following: 1. Complete the incomplete program in the Question 3 folder. 2. Open the incomplete class Transaction_U.ps. 3. Enter your examination number as a comment in the first line of both the Transaction_U.pas file and the Transaction_U.pas file. 4. Compile and execute the program. The program has no functionality currently. Example of the graphical user interface (GUI): ![GUI Example](https://example.com/gui-example) 3.1 The incomplete object class (TTransaction) provided contains four attributes and an incomplete toString method that defines a Transaction object. - **Attributes of the Transaction object** - CustomerID: The South African identification number of a customer (string) - ContainerSize: A designated size of the container, which can be small (S), medium (M) or large (L). - StoragePeriod: Indicates the number of months that the container will be made available to the customer. - AmountPaid: The amount that the customer has already paid to use the container. Note: You are not allowed to add any additional attributes or user-defined methods unless explicitly stated in the question. 3.1.1 Write code for a constructor method that will receive the customer ID, container size and the storage period in months as parameters. Use these values to initialise the AmountPaid attribute to the value of zero. 3.1.2 Write code for an accessor method called getAmountPaid for the AmountPaid attribute. 3.1.3 Write code for a method called updateAmountPaid that will receive a value as a parameter and add the received value to the AmountPaid attribute. 3.1.4 Write code for a method called calculateCost that will use the Transaction object's attributes to calculate and return the cost of renting the container. The monthly cost of the container will depend on the size of the container, as indicated in the table below. | Container size | Amount per month | |----------------|-------------------| | S | R750.00 | | M | R1750.00 | | L | R2500.00 | The total cost of hiring the container is calculated as follows: - The monthly cost of the container multiplied by the storage period. - A discount of 10% for each increment of 6 months using the following formula or other applicable code: $$ ext{Discount} = 10 ext{%} imes ext{floor}igg(rac{ ext{StoragePeriod}}{6}igg)$$ Limit discount to a maximum of 50%. 3.1.5 An incomplete toString method has been supplied. Write code to complete the toString method to return the attributes of the Transaction object in the following format: Customer ID: Container size: Storage period (months): Amount paid: 3.2 An incomplete unit (Question 3) has been provided and contains code for object details to be accessible. A global Transaction variable called objTransaction has been declared. Do the following to complete the code for QUESTION 3.1 to QUESTION 3.2.3 in the main form: 3.2.1 Button [3.2.1] - Instantiate object Write code to do the following: - Extract customer ID from edit box editQ3_2_1. - Extract first character of v selected item in list box lstQ3_2_1 and - Extract number of months from spin edit. Instantiate the objTransaction object: objTransaction := TTransaction.Create(customerID, size, months); Disable btnQ3_2_1. 3.2.2 Button [3.2.2 (a)] - Display amount due! Write code to do the following: - Call the calculateCost method. - Display the amount due on pnlQ3_2_2. 3.2.2 (b) Button [3.2.2 (b)] - Process payment The customer needs to enter an amount to be paid in the provided edit box editQ3_2_2. Write code to do the following: - Extract the amount that was entered in box editQ3_2_2. - Use the appropriate method to update the attribute of the AmountPaid with the amount extracted from editQ3_2_2. - Use the appropriate methods to calculate the updated amount due. - Display the updated amount on the panel pnlQ3_2_2. Example output if the customer selected a small container size for a storage period of 3 months, with an amount of R1 200 paid: Example output of the customer selected a small container size for a storage period of 3 months, with an amount of R200 paid: 3.2.3 Button [3.2.3] - View details The customer must be able to view the details of the Transaction object. Code to clear the rich edit component has been provided. Write code to display the attributes of the Transaction object in the rich edit. Example of output with the default values selected and no amount paid yet: | 3.2.3 - View details | |----------------------| | Customer ID: | | Container size: | | Storage period (months): | | Amount paid: |

An import-export company rents out containers to customers who use it to store goods for a specific period of time - NSC Information Technology - Question 3 - 2020 - Paper 1

Worked Solution & Example Answer:An import-export company rents out containers to customers who use it to store goods for a specific period of time - NSC Information Technology - Question 3 - 2020 - Paper 1

3.1.1 Write code for a constructor method that will receive the customer ID, container size and the storage period in months as parameters.

3.1.2 Write code for an accessor method called getAmountPaid for the AmountPaid attribute.

3.1.3 Write code for a method called updateAmountPaid that will receive a value as a parameter and add the received value to the AmountPaid attribute.

3.1.4 Write code for a method called calculateCost that will use the Transaction object's attributes to calculate and return the cost of renting the container.

3.1.5 Write code to complete the toString method to return the attributes of the Transaction object in a specific format.

3.2.1 Button [3.2.1] - Instantiate object

3.2.2 (a) Button [3.2.2 (a)] - Display amount due!

3.2.2 (b) Button [3.2.2 (b)] - Process payment

3.2.3 Button [3.2.3] - View details

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