LPU_Java_Unit 2_Lecture 11_RB

1. Problem Statement

Samantha wants to develop a program to organize a set of numbers in an array. The program should accept the array size (n) and n integers as input, categorize them as even and odd, and display the grouped numbers.

It should contain a class called NumberClassifier with attributes including n (array size) and an array to store input numbers.

Input format:
The first line consists of an integer n, representing the size of the array.
The second line consists of n space-separated integers representing the array elements.

Output format:
The first line prints:
Even numbers: followed by the even numbers from the given array, separated by a space.

The second line prints:
Odd numbers: followed by the odd numbers from the given array, separated by a space.

Solution:

class NumberClassifier {
    int n;

    public void classifyNumbers(int[] arr) {
        System.out.print("Even numbers: ");
        for (int i = 0; i < n; i++) {
            if (arr[i] % 2 == 0) {
                System.out.print(arr[i] + " ");
            }
        }
        System.out.println();
    }

    public void printEvenNumbers(int[] arr) {
        // Even numbers are printed in classifyNumbers
    }

    public void printOddNumbers(int[] arr) {
        System.out.print("Odd numbers: ");
        for (int i = 0; i < n; i++) {
            if (arr[i] % 2 != 0) {
                System.out.print(arr[i] + " ");
            }
        }
        System.out.println();
    }
}

2. Problem Statement

Arun is working on a project to convert seconds to a time format. He wants to create a program that accepts a time duration in seconds and converts it into hours, minutes, and seconds.

Help him write a logic under class SecondsToTime with a constructor that gets input in seconds and converts it into hh:mm:ss format.

Input format:
The input consists of a single integer, representing the time duration in seconds.

Output format:
The output prints the converted time in the format hh:mm:ss where hh represents hours, mm represents minutes, and ss represents seconds.

Solution:

class SecondsToTime {
    int hours, minutes, seconds;

    public SecondsToTime(int totalSeconds) {
        this.hours = totalSeconds / 3600;
        totalSeconds %= 3600;
        this.minutes = totalSeconds / 60;
        this.seconds = totalSeconds % 60;
    }

    public void displayTime() {
        System.out.printf("%02d:%02d:%02d\n", hours, minutes, seconds);
    }
}