Can anyone see what is wrong with this code?

#include<stdio.h>
#include<math.h>
#include<conio.h>

main(){
  //Declarations
  double pi=3.14159265358979,a,c,d,dlat,dlon,lat1,lat2,lon1,lon2;
  int days,hours,s,r=3956;

  //Header
  printf("Origin Coordinates \n  1) 16, 64 \t\t Speed: 20 mph \n  2) 32, 64 (Bermuda) \t Speed: 10 mph \n\nDestination Coordinates \n  1) 26, 80 (Ft. Lauderdale) \n\n\n");

  //Read Input
  printf("Please Enter the Origin Coordinates: ");
  scanf("%f, %f",&lat1,&lon1);
  printf("Please Enter the Destination Coordinates: ");
  scanf("%f, %f",&lat2,&lon2);
  printf("Please Enter the Speed of Travel: ");
  scanf("%d",&s);

  //Convert Coordinates From Decimal Degrees to Radians
  lat1*=pi/180;
  lat2*=pi/180;
  lon1*=pi/180;
  lon2*=pi/180;

  //The Haversine Formula
  dlat=lat2-lat1;
  dlon=lon2-lon1;
  a=((sin(dlat/2))*(sin(dlat/2)))+cos(lat1)*cos(lat2)*((sin(dlon/2))*(sin(dlon/2)));
  c=2*atan2(sqrt(a),sqrt(1-a));
  d=r*c;

  //Find Time
  hours=d/s;
  days=hours/24;
  hours-=days*24;

  //Print Output
  printf("\n\nDistance: %f Statute Miles \nSpeed: %d mph\nTime (Days/Hours): %d/%d",d,s,days,hours);

  getch();
}

printf("\nPlease Enter the Origin Coordinates:\n");
printf("Lat: ");
scanf("%f", &lat1);
printf("\nLon: ");
scanf("%f", &lon1);
printf("\nPlease Enter the Destination Coordinates:\n");
printf("Lat: ");
scanf("%f", &lat1);
printf("\nLon: ");
scanf("%f", &lon1);