// CSE 142, Autumn 2010
// Author: Jessica Miller
// This program computes two people's body mass index (BMI).
//  The code uses parameters, returns, and Scanner.

import java.util.*;  // for Scanner

public class BMI {
    public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		System.out.println("This program reads in data for two people and");
        System.out.println("computes their body mass index (BMI)");
        System.out.println();
		
		double bmi1 = processPerson(1, console);
		double bmi2 = processPerson(2, console);
		reportInfo(bmi1, 1);
		reportInfo(bmi2, 2);
		System.out.println("Difference: " + Math.abs(bmi1 - bmi2));
	}

	public static double processPerson(int number, Scanner console) {
		System.out.println("Enter next person's info: ");
		System.out.print("height (in inches)? ");
		double height = console.nextDouble();
		System.out.print("weight (in lbs)? ");
		double weight = console.nextDouble();
		
		double bmi1 = calculateBMI(height, weight);
		return bmi1;
	}
	
	public static void reportInfo(double bmi1, int number) {
		System.out.println("Person " + number + " BMI = " + bmi1);
		
		if (bmi1 < 18.5) {
			System.out.println("underweight");
		} else if (bmi1 <= 24.9) {
			System.out.println("normal");
		} else if (bmi1 <= 29.9) {
			System.out.println("overweight");
		} else {
			System.out.println("obese");
		}	
	}
	
	public static double calculateBMI(double height, double weight) {
		double bmi = weight / Math.pow(height, 2) * 703;
		return bmi;
	}
}