// CSE 142, Summer 2008 (Marty Stepp)
// This program computes the body mass index (BMI) of two people
// and compares the two to find the difference in BMI.
//
// This version also prints information about the person's weight range using if/else,
// and it rounds the numbers to 3 digits after the decimal point.

import java.util.*;

public class BMI2 {
	public static void main(String[] args) {
		Scanner console = new Scanner(System.in);
		double bmi1 = person(console);
		double bmi2 = person(console);
		results(bmi1, bmi2);
	}
	
	// Prompts for the height/weight of a single person,
	// and returns that person's body mass index.
	public static double person(Scanner console) {
		System.out.println("Enter next person's information:");
		System.out.print("Height (in inches)? ");
		double height = console.nextDouble();

		System.out.print("Weight (in pounds)? ");
		double weight = console.nextDouble();
		
		// compute the bmi
		double bmi = weight / (height * height) * 703;
		
		if (bmi < 18.5) {
			System.out.println("underweight");
		} else if (bmi < 25) {
			System.out.println("normal");
		} else if (bmi < 30) {
			System.out.println("overweight");
		} else {  // bmi >= 30
			System.out.println("obese");
		}
		System.out.println();
		
		return bmi;
	}
	
	// Outputs the overall results of each person's BMI and difference.
	// Uses System.out.printf to round to the nearest thousandth.
	public static void results(double bmi1, double bmi2) {
		System.out.printf("Person #1 body mass index = %.3f\n", bmi1);
		System.out.printf("Person #2 body mass index = %.3f\n", bmi2);
		System.out.printf("Difference = %.3f\n", Math.abs(bmi1 - bmi2));
	}
}