Project 5

import java.util.*;
/**
 * Write a description of class Project5 here.
 * Kailey McNeal
 * 10-2-14
 * Project #5
 */
public class Project5
{
   public static void main (String[] args)
   {
       Scanner console=new Scanner (System.in);
       System.out.print("What is the latitude of the 1st city? ");
       double lat1=console.nextDouble();
       System.out.print("What is the longitude of the 1st city? ");
       double longi1=console.nextDouble();
       System.out.print("What is the latitude of the 2nd city? ");
       double lat2=console.nextDouble();
       System.out.print("What is the longitude of the 2nd city? ");
       double longi2=console.nextDouble();
       longi1=Math.toRadians(longi1);
       lat1=Math.toRadians(lat1);
       longi2=Math.toRadians(longi2);
       lat2=Math.toRadians(lat2);
       double longdis=Math.max(longi1, longi2)-Math.min(longi1, longi2); //longitudinal distance
       double angdiff=Math.acos(Math.sin(lat1)*Math.sin(lat2)+Math.cos(lat1)*Math.cos(lat2)*Math.cos(longdis)); //angular difference
       double answer=angdiff*6372.795;
       System.out.println(answer + "km");
   }
}