Question 3

A company selling goods deals with two types of customers: Dealers and Retailers. The company offers discounts to the dealer and retailer at the time of purchasing goods for paying the bill, as per the tariff given below:

\begin{tabular}{|l|l|l|}
\hline
Days of payment & Discount for Dealer & Discount for Retailer \\
\hline
within 30 days & [tex]$15\%$[/tex] & [tex]$10\%$[/tex] \\
\hline
31 to 45 days & [tex]$10\%$[/tex] & [tex]$5\%$[/tex] \\
\hline
more than 45 days & No discount & No discount \\
\hline
\end{tabular}

Write a program in Java to accept the number of days within which the bill is paid, the type of customer 'D' for dealer and 'R' for retailer, and the amount of purchase. Calculate and display the net amount to be paid by the customer at the time of paying the bill.

[15]

Sure! Let's break down the solution step-by-step:

1. Read the Input Values
- Number of days within which the bill is paid.
- Type of customer ('D' for Dealer and 'R' for Retailer).
- Amount of purchase.

2. Determine the Discount Rate
- Identify the discount rate based on the number of days and the type of customer:
- If payment is within 30 days:
- Dealer: 15%
- Retailer: 10%
- If payment is between 31 to 45 days:
- Dealer: 10%
- Retailer: 5%
- If payment is more than 45 days:
- No discount for either Dealer or Retailer.

3. Calculate the Discount Amount
- Multiply the purchase amount by the discount rate.

4. Calculate the Net Amount
- Subtract the discount amount from the purchase amount.

5. Display the Result

Here’s how you can implement this in Java:

```java
import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

// Read the input values
System.out.println("Enter the number of days within which the bill is paid:");
int days = scanner.nextInt();

System.out.println("Enter the type of customer (D for Dealer, R for Retailer):");
char customerType = scanner.next().charAt(0);

System.out.println("Enter the amount of purchase:");
double purchaseAmount = scanner.nextDouble();

// Initialize the discount rate
double discountRate = 0.0;

// Determine the applicable discount rate
if (days <= 30) {
if (customerType == 'D') {
discountRate = 0.15; // 15% discount for Dealers
} else if (customerType == 'R') {
discountRate = 0.10; // 10% discount for Retailers
}
} else if (days <= 45) {
if (customerType == 'D') {
discountRate = 0.10; // 10% discount for Dealers
} else if (customerType == 'R') {
discountRate = 0.05; // 5% discount for Retailers
}
}

// Calculate the discount amount
double discountAmount = purchaseAmount * discountRate;

// Calculate the net amount to be paid
double netAmount = purchaseAmount - discountAmount;

// Display the net amount to be paid
System.out.printf("Net amount to be paid: %.2f%n", netAmount);

// Close the scanner
scanner.close();
}
}
```

### Explanation:
- First, we import the `Scanner` class for reading input.
- We then prompt the user to enter the days, customer type, and purchase amount and read these values.
- Depending on the input values, we identify the discount rate:
- For payments within 30 days, Dealers get a 15% discount and Retailers get a 10% discount.
- For payments between 31 and 45 days, Dealers get a 10% discount and Retailers get a 5% discount.
- For payments after 45 days, no discount is applied.
- We calculate the discount amount by multiplying the purchase amount by the discount rate.
- The net amount to be paid is calculated by subtracting the discount amount from the purchase amount.
- Finally, we print the net amount to be paid.

This solution systematically addresses the problem and covers all the tariff conditions provided.