// Better version of BMI program that utilizes return values for
//   proper information flow.

import java.util.*;

public class GoodBMI {
  public static void main(String[] args) {
    Scanner console = new Scanner(System.in);
    
    printIntro();
    double bmi = reportBmi(console);
    String status = getStatus(bmi);
    
    System.out.println("Person's BMI: " + bmi);
    System.out.println("Person's BMI status: " + status);
  }
  
  public static void printIntro() {
    System.out.println("This program reads data for one");
    System.out.println("person and computes his/her body");
    System.out.println("mass index and weight status.");
    System.out.println();
  }
  
  public static double reportBmi(Scanner console) {
    double height = getHeight(console);
    double weight = getWeight(console);
    double bmi = getBmi(height, weight);
    return bmi;
  }

  public static double getHeight(Scanner console) {
    System.out.println("Enter next person's information:");
    System.out.print("height (in inches)? ");
    double height = console.nextDouble();
    return height;
  }

  public static double getWeight(Scanner console) {
    System.out.print("weight (in pounds)? ");
    double weight = console.nextDouble();
    return weight;
  }

  public static String getStatus(double bmi) {
    String status;
    if (bmi < 18.5) {
      status = "underweight";
    } else if (bmi < 25) {
      status = "normal";
    } else if (bmi < 30) {
      status = "overweight";
    } else {  // bmi >= 30
      status = "obese";
    }
    
    return status;
  }
  
  public static double getBmi(double height, double weight) {
    double bmi = weight / (height * height) * 703;
    return bmi;
  }
}