Getting error while creating bmi calculator

Im creating a bmi caculator and im using the height and weight formula. I keep getting an erorr that says nan obese at the very end and i dont know what i'm missing or what i need to edit. Any help would be appreciated.

//BMI = (703 * weightInPounds) / heightInInches^2 is the formula

import java.util.Scanner;

public class Bmi_Calc {

public static void main(String[] args) {
    // TODO Auto-generated method st
            Scanner input = new Scanner(System.in);

            //double weight;
            double weightInPounds;
            int feet; 
            int inches; 
            //int weightInPounds;
            int heightInInches;
            double height;


            System.out.print("Enter Weight in pounds: ");
            double weight = input.nextDouble();

            System.out.println("Enter height (ft.): ");
            feet = input.nextInt();

            System.out.println("Enter height (in.): ");
            inches = input.nextInt();

            weightInPounds = 0;
            heightInInches = 0;

            double bmi = (703 * weightInPounds) / Math.pow(heightInInches, 2.0);
            double heightMeters = ((feet * 12) + inches) * .0254;

            System.out.println("Your BMI is: " + bmi);

            if (bmi < 18.5) {
                System.out.println("Underweight.");
            }

            if ((bmi >= 18.5) && (bmi < 24.9)) {
                System.out.println("Normal weight");
            }

            if ((bmi >= 25) && (bmi < 29.9)) {
                System.out.println("Overwight");
            }

            else {
                System.out.println("Obese");
            }


            input.close();


        }

    }