The difference between a reference and a pointer C++

difference_between_reference_and_pointer.cpp

// Difference between a pointer and a reference in C++
// http://cpp.sh/64ahf
#include <iostream>

int main()
{
  int a = 123;
  int b = 456;
  
  int & ra = a; // reference, also "int &ra = a;
  ra = b;
  
  int * p = &ra; // pointer, also "int *p = &ra; & means get address
  
  std::cout << "a == ra == p* == " << *p << " - VALUE\n";
  std::cout << "&a == &ra == p == " << p << " - ADDRESS\n";
  std::cout << "&p = " << &p << " - ADDRESS OF THE POINTER\n";
  
// a == ra == p* == 456 - VALUE
// &a == &ra == p == 0x78843187e654 - ADDRESS
// &p = 0x78843187e658 - ADDRESS OF THE POINTER
}