Point a, b;
...
a = b;

TextFile a, b;
a.Open( "FILE1.DAT" );
b.Open( "FILE2.DAT" );
b = a;

// spec1_copying_class_objects.cpp
class Window
{
public:
 Window( const Window& ); // Declare copy constructor.
 // ...
};

int main()
{
}

// MemoryBlock.h
#pragma once
#include <iostream>
#include <algorithm>

class MemoryBlock
{
public:

 // Simple constructor that initializes the resource.
 explicit MemoryBlock(size_t length)
  : _length(length)
  , _data(new int[length])
 {
  std::cout << "In MemoryBlock(size_t). length = "
    << _length << "." << std::endl;
 }

 // Destructor.
 ~MemoryBlock()
 {
  std::cout << "In ~MemoryBlock(). length = "
    << _length << ".";

  if (_data != nullptr)
  {
   std::cout << " Deleting resource.";
   // Delete the resource.
   delete[] _data;
  }

  std::cout << std::endl;
 }

 // Copy constructor.
 MemoryBlock(const MemoryBlock& other)
  : _length(other._length)
  , _data(new int[other._length])
 {
  std::cout << "In MemoryBlock(const MemoryBlock&). length = " 
    << other._length << ". Copying resource." << std::endl;

  std::copy(other._data, other._data + _length, _data);
 }

 // Copy assignment operator.
 MemoryBlock& operator=(const MemoryBlock& other)
 {
  std::cout << "In operator=(const MemoryBlock&). length = " 
    << other._length << ". Copying resource." << std::endl;

  if (this != &other)
  {
   // Free the existing resource.
   delete[] _data;

   _length = other._length;
   _data = new int[_length];
   std::copy(other._data, other._data + _length, _data);
  }
  return *this;
 }

 // Retrieves the length of the data resource.
 size_t Length() const
 {
  return _length;
 }

private:
 size_t _length; // The length of the resource.
 int* _data; // The resource.
};

MemoryBlock(MemoryBlock&& other)
 : _data(nullptr)
 , _length(0)
{
}

_data = other._data;
_length = other._length;

other._data = nullptr;
other._length = 0;

MemoryBlock& operator=(MemoryBlock&& other)
{
}

if (this != &other)
{
}

// Free the existing resource.
delete[] _data;

// Copy the data pointer and its length from the 
// source object.
_data = other._data;
_length = other._length;

// Release the data pointer from the source object so that
// the destructor does not free the memory multiple times.
other._data = nullptr;
other._length = 0;

return *this;

// Move constructor.
MemoryBlock(MemoryBlock&& other)
 : _data(nullptr)
 , _length(0)
{
 std::cout << "In MemoryBlock(MemoryBlock&&). length = " 
    << other._length << ". Moving resource." << std::endl;

 // Copy the data pointer and its length from the 
 // source object.
 _data = other._data;
 _length = other._length;

 // Release the data pointer from the source object so that
 // the destructor does not free the memory multiple times.
 other._data = nullptr;
 other._length = 0;
}

// Move assignment operator.
MemoryBlock& operator=(MemoryBlock&& other)
{
 std::cout << "In operator=(MemoryBlock&&). length = " 
    << other._length << "." << std::endl;

 if (this != &other)
 {
  // Free the existing resource.
  delete[] _data;

  // Copy the data pointer and its length from the 
  // source object.
  _data = other._data;
  _length = other._length;

  // Release the data pointer from the source object so that
  // the destructor does not free the memory multiple times.
  other._data = nullptr;
  other._length = 0;
 }
 return *this;
}

// rvalue-references-move-semantics.cpp
// compile with: /EHsc
#include "MemoryBlock.h"
#include <vector>

using namespace std;

int main()
{
 // Create a vector object and add a few elements to it.
 vector<MemoryBlock> v;
 v.push_back(MemoryBlock(25));
 v.push_back(MemoryBlock(75));

 // Insert a new element into the second position of the vector.
 v.insert(v.begin() + 1, MemoryBlock(50));
}

In MemoryBlock(size_t). length = 25.
In MemoryBlock(MemoryBlock&&). length = 25. Moving resource.
In ~MemoryBlock(). length = 0.
In MemoryBlock(size_t). length = 75.
In MemoryBlock(MemoryBlock&&). length = 25. Moving resource.
In ~MemoryBlock(). length = 0.
In MemoryBlock(MemoryBlock&&). length = 75. Moving resource.
In ~MemoryBlock(). length = 0.
In MemoryBlock(size_t). length = 50.
In MemoryBlock(MemoryBlock&&). length = 50. Moving resource.
In MemoryBlock(MemoryBlock&&). length = 50. Moving resource.
In operator=(MemoryBlock&&). length = 75.
In operator=(MemoryBlock&&). length = 50.
In ~MemoryBlock(). length = 0.
In ~MemoryBlock(). length = 0.
In ~MemoryBlock(). length = 25. Deleting resource.
In ~MemoryBlock(). length = 50. Deleting resource.
In ~MemoryBlock(). length = 75. Deleting resource.

// Move constructor.
MemoryBlock(MemoryBlock&& other)
 : _data(nullptr)
 , _length(0)
{
 *this = std::move(other);
}