Question

Define a class named Step Tracker with the following specifications:

Member Variables:

String name	− stores the user’s name.
int sw	− stores the total number of steps walked by the user.
double cb	− stores the estimated calories burned by the user.
double km	− stores the estimated distance walked in kilometres.

Member Methods:

void accept()	− to input the name and the steps walked using Scanner class methods only.
void calculate()	− calculates calories burned and distance in km based on steps walked using the following estimation table:

Metric	Calculation Formula
Calories Burned	steps walked × 0.04 (e.g., 1 step burns 0.04 calories)
Distance (Km)	steps walked/1300 (e.g., 1300 steps is approx. 1 km)

void display()

− Display the calories burned, distance in km and the user’s name.

Write a main method to create an object of the class and invoke the methods.

Answer 1

import java.util.Scanner;

class StepTracker {
    // Member Variables
    String name;
    int sw;
    double eb; // Based on image text "eb", though "cb" is also commonly used
    double km;

    // Member Method to input data
    void accept() {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter user name: ");
        name = sc.nextLine();
        System.out.print("Enter steps walked: ");
        sw = sc.nextInt();
    }

    // Member Method to calculate metrics
    void calculate() {
        // Formula: steps * 0.04
        eb = sw * 0.04;
        
        // Formula: steps / 1300
        // We use 1300.0 to ensure decimal division (double)
        km = sw / 1300.0;
    }

    // Member Method to display results
    void display() {
        System.out.println("User Name: " + name);
        System.out.println("Estimated Calories Burned: " + eb);
        System.out.println("Estimated Distance (Km): " + km);
    }

    // Main method to invoke the methods
    public static void main(String[] args) {
        StepTracker obj = new StepTracker();
        obj.accept();
        obj.calculate();
        obj.display();
    }
}