The complete program is given below.
Here is the complete main().
Of course, the program still cannot be run because the class Car
has not yet been defined.
import java.util.Scanner ;
import Car;
class MilesPerGallon
{
  public static void main( String[] args ) 
  {
    Scanner scan = new Scanner(System.in);
    double startMiles, endMiles, gallons;
    System.out.print("Enter first reading: " ); 
    startMiles = scan.nextDouble();
    System.out.print("Enter second reading: " ); 
    endMiles = scan.nextDouble();
    System.out.print("Enter gallons: " ); 
    gallons = scan.nextDouble();
    Car car = new Car( startMiles, endMiles, gallons  );
    System.out.println( "Miles per gallon is " + car.calculateMPG() );
  }
}
        
We still need a definition for class Car.
Can a programmer write a definition for the class Car?