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Java Programs - Solved 2025 Specimen Paper ISC Computer Science

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Solved 2025 Specimen Paper ISC Computer Science

Class 12 - ISC Computer Science Solved Specimen Papers

LCM using Recursion Program Specimen - ISC 2025 Specimen

A class LCM has been defined to find the Lowest Common Multiple of two integers.

 

Some of the data members and member functions are given below:

Class name: LCM

Data members/instance variables:
n1: to store an integer number
n2: to store an integer number
large: integer to store the largest from n1, n2
sm: integer to store the smallest from n1, n2
l: to store LCM of two numbers

Methods/Member functions:
LCM(): default constructor to initialize data members with legal initial values
void accept(): to accept n1 and n2
int getLCM(): returns the LCM of n1 and n2 using the recursive technique
void display(): to print the numbers n1, n2 and LCM

Specify the class LCM giving details of the constructor, void accept(), int getLCM() and void display(). Define a main() function to create an object and call the member functions accordingly to enable the task.

Java 
import java.util.Scanner;
class LCM{
    int n1;
    int n2;
    int large;
    int sm;
    int l;
    public LCM(){
        n1 = 0;
        n2 = 0;
        large = 0;
        sm = 0;
        l = 0;
    }
    public void accept(){
        Scanner in = new Scanner(System.in);
        System.out.print("First number: ");
        n1 = Integer.parseInt(in.nextLine());
        System.out.print("Second number: ");
        n2 = Integer.parseInt(in.nextLine());
        if(n1 > n2){
            large = n1;
            sm = n2;
        }
        else{
            large = n2;
            sm = n1;
        }
    }
    public int getLCM(){
        if(large != sm){
            if(large > sm)
                large -= sm;
            else if(large < sm)
                sm -= large;
            return getLCM();
        }
        else
            return n1 * n2 / large;
    }
    public void display(){
        System.out.println("First number: " + n1);
        System.out.println("Second number: " + n2);
        l = getLCM();
        System.out.println("LCM: " + l);
    }
    public static void main(String[] args) {
        LCM obj = new LCM();
        obj.accept();
        obj.display();
    }
}

Output

 
OUTPUT 1:
First number: 12
Second number: 7
First number: 12
Second number: 7
LCM: 84


OUTPUT 2:
First number: 6
Second number: 4
First number: 6
Second number: 4
LCM: 12
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