text: #include <iostream>
  #include <string>
  
  #include "car.h"
  
  using std::cout;
  using std::string;
  
  int main()
  {
      // Create class instances for each car.
      Car car_1 = Car("green", 1);
      Car car_2 = Car("red", 2);
      Car car_3 = Car("blue", 3);
      car_1.PrintCarData();
  
      // Increment car_1's position by 1.
      car_1.IncrementDistance();
      // // Print out the position and color of each car.
      car_1.PrintCarData();
      car_2.PrintCarData();
      car_3.PrintCarData();
  }
  