🚀 Programming Example
Design a class name ShowRoom with the following description:
Learn this program step-by-step with algorithm, source code, output and detailed explanation.
Design a class name ShowRoom with the following description:
Instance variables / Data members:
String name — To store the name of the customer
long mobno — To store the mobile number of the customer
double cost — To store the cost of the items purchased
double dis — To store the discount amount
double amount — To store the amount to be paid after discount
Member methods:
ShowRoom() — default constructor to initialize data members
void input() — To input customer name, mobile number, cost
void calculate() — To calculate discount on the cost of purchased items, based on following criteria
| Cost | Discount (in percentage) |
|---|---|
| Less than or equal to ₹10000 | 5% |
| More than ₹10000 and less than or equal to ₹20000 | 10% |
| More than ₹20000 and less than or equal to ₹35000 | 15% |
| More than ₹35000 | 20% |
void display() — To display customer name, mobile number, amount to be paid after discount.
Write a main method to create an object of the class and call the above member methods.
import java.util.Scanner;
public class ShowRoom
{
private String name;
private long mobno;
private double cost;
private double dis;
private double amount;
public ShowRoom()
{
name = "";
mobno = 0;
cost = 0.0;
dis = 0.0;
amount = 0.0;
}
public void input() {
Scanner in = new Scanner(System.in);
System.out.print("Enter customer name: ");
name = in.nextLine();
System.out.print("Enter customer mobile no: ");
mobno = in.nextLong();
System.out.print("Enter cost: ");
cost = in.nextDouble();
}
public void calculate() {
int disPercent = 0;
if (cost <= 10000)
disPercent = 5;
else if (cost <= 20000)
disPercent = 10;
else if (cost <= 35000)
disPercent = 15;
else
disPercent = 20;
dis = cost * disPercent / 100.0;
amount = cost - dis;
}
public void display() {
System.out.println("Customer Name: " + name);
System.out.println("Mobile Number: " + mobno);
System.out.println("Amout after discount: " + amount);
}
public static void main(String args[]) {
ShowRoom obj = new ShowRoom();
obj.input();
obj.calculate();
obj.display();
}
}
Enter customer name: Rumman Ansari
Enter customer mobile no: 8765465655
Enter cost: 26000
Customer Name: Rumman Ansari
Mobile Number: 8765465655
Amout after discount: 22100.0
Press any key to continue . . .
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.