C++ Programming Write a main()function that declares several integer, double, and City and Planet objects, and uses the calcDistance()function to compute the distance for several pairs. Save the file as Distance.cpp. Solution Here is the main() function for you: main() { int pInt1, pInt2; double pDouble1, pDouble2; City pCity1, pCity2; Planet pPlanet1, pPlanet2; cout<<\"The distance between \"<.