#include <iostream>
#include <ostream>
#include <chrono>

int main(void) {
  // Part 1
  std::cout << "! ------------- [Part 1] -------------" << std::endl;

  std::cout << "! Setting integer 1 and 2 to 4 and 5 respectively, directly"
            << std::endl;
  int iNum = 4;
  int iNum2 = 5;

  std::cout << "! Creating pointer 1 and 2 with null pointer values"
            << std::endl;
  int *pINum1 = nullptr;
  int *pINum2 = nullptr;

  std::cout << "! Setting pointer 1 and 2 to the memory addresses of integer 1 "
               "and 2 respectively"
            << std::endl;
  pINum1 = &iNum;

  pINum2 = &iNum2;

  std::cout << "Pointer 1 address: " << pINum1 << std::endl;
  std::cout << "Integer 1 address: " << &iNum << std::endl << std::endl;

  std::cout << "Pointer 2 address: " << pINum2 << std::endl;
  std::cout << "Integer 2 address: " << &iNum2 << std::endl << std::endl;

  std::cout << "Integer 1 value (dereferenced from pointer 1): " << *pINum1
            << std::endl;

  std::cout << "Integer 2 value (dereferenced from pointer 2): " << *pINum2
            << std::endl;

  // Part 2
  std::cout << std::endl
            << "! ------------- [Part 2] -------------" << std::endl;

  std::cout << "! Setting integer 1 value directly to 6" << std::endl;
  iNum = 6;

  std::cout << "Integer 1 value (directly): " << iNum << std::endl;

  std::cout << "Integer 1 value (dereferenced from pointer 1): " << *pINum1
            << std::endl;

  // Part 3
  std::cout << std::endl << "------------- [Part 3] -------------" << std::endl;

  std::cout << "! Setting value referenced by pointer 1 to a 7" << std::endl;
  *pINum1 = 7;

  std::cout << "Integer 1 value (directly): " << iNum << std::endl;

  // Part 4
  std::cout << std::endl << "------------- [Part 4] -------------" << std::endl;

  std::cout << "! Setting pointer 2 address to the same as pointer 1"
            << std::endl;
  pINum2 = pINum1;

  std::cout << "Pointer 2 address: " << pINum2 << std::endl;

  std::cout << "Value of pointer 2 dereference: " << *pINum2 << std::endl;

  std::cout << "! Setting underlying value of pointer 2 to 8" << std::endl;
  *pINum2 = 8;

  std::cout << std::endl
            << "Integer 1 value (dereferenced from pointer 1): " << *pINum1
            << std::endl;
  std::cout << "Integer 1 value (dereferenced from pointer 2): " << *pINum2
            << std::endl;
  std::cout << "Integer 1 value (directly): " << iNum << std::endl << std::endl;

  std::cout << "Integer 2 value (directly): " << iNum2 << std::endl;

  // Part 5
  std::cout << std::endl << "------------- [Part 5] -------------" << std::endl;

  std::cout << "! Creating a double pointer with a null pointer value"
            << std::endl;
  double *pDNum = nullptr;

  // pDNum = &iNum; error: cannot convert ‘int*’ to ‘double*’ in assignment

  // pDNum = pINum1; error: cannot convert ‘int*’ to ‘double*’ in assignment

  std::cout << "! Creating a double with value 14.25" << std::endl;
  double dNum = 14.25;

  std::cout << "! Setting double pointer to the memory address of the double"
            << std::endl;
  pDNum = &dNum;

  std::cout << "Address of double (from double pointer): " << pDNum
            << std::endl;
  std::cout << "Value of double (from double pointer): " << *pDNum << std::endl;

  std::cout << "! Assigning the value pointed at by pointer 1 to the value "
               "pointed at by the double pointer"
            << std::endl;
  *pDNum = *pINum1;

  std::cout << "Value of double (directly): " << dNum << std::endl;
  std::cout << "Value of double (from double pointer): " << *pDNum << std::endl;
}