Function main

Examples/NoModules/Chapter 08/Ex8_07.cpp:7–16

void change_it_by_reference(double& reference_to_it);  // Pass by reference

int main()
{
  double it {5.0};

  change_it_by_pointer(&it);         // Now we pass the address
  std::cout << "After first function execution, it = " << it << std::endl;

  change_it_by_reference(it);        // Now we pass a reference, not the value!
  std::cout << "After second function execution, it = " << it << std::endl;
}

void change_it_by_pointer(double* pit)
{