Question

2.18 LAB: Calories burned during workout (expressions) Programming Language : JAVA

The following equations estimate the calories burned when exercising (source):

Men: Calories = [(Age x 0.2017) — (Weight x 0.09036) + (Heart Rate x 0.6309) — 55.0969] x Time / 4.184

Women: Calories = [(Age x 0.074) — (Weight x 0.05741) + (Heart Rate x 0.4472) — 20.4022] x Time / 4.184

Write a program using inputs age (years), weight (pounds), heart rate (beats per minute), and time (minutes). Output calories burned for men and women.

Ex: If the input is 49 155 148 60, the output is:

Men: 489.7772466539196 calories
Women: 580.939531548757 calories

Template give:

import java.util.Scanner;

public class LabProgram {
public static void main(String[] args) {
// Men: Calories = [(Age x 0.2017) - (Weight x 0.09036) + (Heart Rate x 0.6309) - 55.0969] x Time / 4.184
// Women: Calories = [(Age x 0.074) - (Weight x 0.05741) + (Heart Rate x 0.4472) - 20.4022] x Time / 4.184
  
Scanner scnr = new Scanner(System.in);
double ageYears;
double weightPounds;
double heartBPM; // beats per minute
double timeMinutes;
double caloriesMan;
double caloriesWoman;

Answer 1

Following is the answer:

Calories.java

import java.util.Scanner;

public class Calories {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter age(in years): ");
        double ageYears = sc.nextDouble();
        System.out.println("Enter weight (pounds): ");
        double weightPounds = sc.nextDouble();
        System.out.println("Enter headr rate (beats per minute): ");
        double heartBPM = sc.nextDouble(); // beats per minute
        System.out.println("Enter time (minutes): ");
        double timeMinutes = sc.nextDouble();

        double caloriesMan =  ((ageYears * 0.2017) - (weightPounds * 0.09036) + (heartBPM * 0.6309) - 55.0969) * timeMinutes / 4.184;
        double caloriesWoman = ((ageYears * 0.074) - (weightPounds * 0.05741) + (heartBPM * 0.4472) - 20.4022) * timeMinutes / 4.184;

        System.out.println("Men: " + caloriesMan);
        System.out.println("Women: " + caloriesWoman);
    }
}

Output: