C++ Fundamentals

// Type your code here, or load an example.  --->>>  Godbolt.org  // Compiler Explorer
#include <iostream>

int cppbasics() {
// ---------------
// What is a pointer / reference ...
       int  a = 3;
       int& b = a;
       int* p = &a;
  long int  q = (long int) &b;

  std::cout << a << " " << b << " " << p << " 0x" << std::hex << q;

// ---------------
// What is the arrow operator ...

  struct Test { int c;
                Test() {c=0;};    //constructor
              } b;
  Test*  e = &b;
  int    d;

  d   = (&b)->c;  std::cout << " d " << d;
  d   =    e->c;  std::cout << " d " << d;
  d   = (*e) .c;  std::cout << " d " << d;

// ---------------
  return 0;
}

int main() {
    cppbasics();
}