CPSC 120 Example showing how references are different than copies of a value.

cpsc120_int_reference.cc

// Gist https://gist.github.com/880c7bba03f62a3cf7e6a16321aacaf6

#include <iostream>

int main(int argc, char const* argv[]) {
  int number{42};
  int& number_reference = number;
  int a_copy{number};
  int another_copy{-23};

  std::cout << "number: " << number << "\n";
  std::cout << "number_reference: " << number_reference << "\n";
  std::cout << "a_copy: " << a_copy << "\n";
  std::cout << "another_copy: " << another_copy << "\n";

  std::cout << "Let's change number and make another copy.\n";
  another_copy = number;
  number = 17;

  std::cout << "number: " << number << "\n";
  std::cout << "number_reference: " << number_reference << "\n";
  std::cout << "a_copy: " << a_copy << "\n";
  std::cout << "another_copy: " << another_copy << "\n";

  return 0;
}