Descriptive Questions - ICSE

Question 1:

Define a class called LMS with the following description:

Instance Variables/Data Members:
int acc_num — stores the accession number of the book.
String title — stores the title of the book.
String author — stores the name of the author.

Member methods:

1.     void input() — To input and store the accession number, title and author.

2.     void compute() — To accept the number of days late, calculate and display the fine charged at the rate of Rs. 2 per day.

3.     void display() — To display the details in the following format:

Fine is Rs

Accession Number    Title   Author

Write a main method to create an object of the class and call the above member methods.

Solution:

import java.util.Scanner;

class LMS

{

    int acc_num;

    String title, author;

    void input()

    {

        Scanner Sr = new Scanner(System.in);

        System.out.print("Enter accession number: ");

        acc_num = Sr.nextInt();

        System.out.print("Enter title: ");

        title = Sr.nextLine();

        System.out.print("Enter author: ");

        author = Sr.nextLine();

    }

    void compute()

    {

        Scanner Sr = new Scanner(System.in);

        System.out.print("Enter number of days late: ");

        int daysLate = Sr.nextInt();

        int fine = 2 * daysLate;

        System.out.println("Fine is Rs " + fine);

    }

    void display()

    {

        System.out.println("Accession Number\tTitle\tAuthor");

        System.out.println(acc_num + "\t\t " + title + "\t" + author);

    }

    public static void main(String[] args)

    {

        LMS libms = new LMS();

        libms.input();

        libms.compute();

        libms.display();

    }

}

VARIABLE DESCRIPTION TABLE
Name of Variable	Data Type	Purpose/Description
args	String[]	To accept command line arguments
acc_num	int	To store the accession number of the book
title	String	To store the title of the book
author	String	To store the author of the book
daysLate	int	To store the number of days late
fine	int	To store the fine amount

Question 2:

Define a class with the following specifications:
Class name: Bank
Member variables:
double p – stores the principal amount
double n – stores the time period in years
double r – stores the rate of interest
double a – stores the amount
Member methods:
void accept() – input values for p and n using Scanner class methods only.
void calculate() – calculate the amount based on the following conditions:

Time in (Years)	Rate %
Up to 1/2	9
> 1/2 to 1 year	10
> 1 to 3 years	11
> 3 years	12

void display() – displays the details in the given format:

Principal    Time    Rate    Amount
xxx          xxx     xxx     xxx

Write a main() method to create an object and call the above methods.

Solution:

import java.util.Scanner;
class bank
{
    double p,n,r,a;
    Scanner sc = new Scanner(System.in);
    void accept()
    {
       System.out.println("Enter Principal");
       p = sc.nextDouble();
       System.out.println("Enter number of years");
       n = sc.nextDouble();
    }
    void calculate()
    {
        if(n<=0.5)
        {
            r = 9;
        }
        else if(n>0.5 && n<=1)
        {
            r = 10;
        }
        else if(n>1 && n<=3)
        {
            r=11;
        }
        else
        {
            r=12;
        }
        a = p*(Math.pow(1+r/100,n));
    }
    void display()
    {
        System.out.println("Principal\tRate\tTime\tAmount");
        System.out.println(p+"\t\t"+r+"\t"+n+"\t"+a);
    }
    public static void main(String[]args)
    {
        bank bnk = new bank();
        bnk.accept();
        bnk.calculate();
        bnk.display();
    }
}

VARIABLE DESCRIPTION TABLE
Name of Variable	Data Type	Purpose/Description
args	String[]	To accept command line arguments
p	double	To store the Principal amount
n	double	To store the time period in years
r	double	To store the rate of interest
a	double	To store the amount