计算BMI

  
  import java.util.*;
  class Main {
    public static void main(String args[]){
      Scanner input = new Scanner(System.in);
  
      //prompt the user to enter weight in pounds
      System.out.print("Enter weight in pounds: ");
      double weight = input.nextDouble();
  
      //prompt the user to enter height in inches
      System.out.print("Enter height in inches: ");
      double height = input.nextDouble();
  
      final double KILOGRAMS_PER_POUND = 0.45359237;
      final double METERS_PER_INCH = 0.0254;
  
      //Compute BMI
      double weightInKilograms = weight * KILOGRAMS_PER_POUND;
      double heightInMeters = height * METERS_PER_INCH;
      double bmi = weightInKilograms / (heightInMeters * heightInMeters);
      bmi = (int)(bmi * 100) / 100.0;
  
      //Display result
      System.out.println("Your BMI is " + bmi);
      if(bmi < 16)
        System.out.println("You are seriously underweight");
      else if(bmi < 18)
        System.out.println("You are underweight");
      else if(bmi < 24)
        System.out.println("You are normal weight");
      else if(bmi < 29)
        System.out.println("You are overweight");
      else if(bmi < 35)
        System.out.println("You are seriously overweight");
      else
        System.out.println("You are gravely overweight");
  
    }
   
  }