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An import-export company rents out containers to customers who use to store goods for a specific period of time - NSC Information Technology - Question 3 - 2020 - Paper 1
Question 3
An import-export company rents out containers to customers who use to store goods for a specific period of time. Transactions are created between the company and the... show full transcript
Worked Solution & Example Answer:An import-export company rents out containers to customers who use to store goods for a specific period of time - NSC Information Technology - Question 3 - 2020 - Paper 1
Step 1
1.1 Write code for a constructor method that will receive the following parameters.
Answer
The constructor for the TTransaction class can be defined as follows:
public TTransaction(string customerID, string containerSize, int storagePeriod)
{
this.customerID = customerID;
this.containerSize = containerSize;
this.storagePeriod = storagePeriod;
this.amountPaid = 0;
}
Step 2
Step 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.
Answer
The method for updating the amount paid can be defined like this:
public void UpdateAmountPaid(double amount)
{
this.amountPaid += amount;
}
Step 4
1.4 Write code for a method called calculateCost that will use the Transaction objects’ attributes to calculate and return the cost of renting the container.
Answer
The calculateCost method can be written as follows:
public double CalculateCost()
{
double initialCost;
if (this.containerSize == "S")
initialCost = 750.00;
else if (this.containerSize == "M")
initialCost = 1750.00;
else
initialCost = 2500.00;
double totalCost = initialCost * this.storagePeriod;
double discount = Math.Floor(this.storagePeriod / 6) * 0.10;
if (discount > 0.50) discount = 0.50;
totalCost -= totalCost * discount;
return totalCost;
}