Задачи для тренировки и лучшего понимания

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//---------------------------------------------------------------------------
#include <iostream.h>
//---------------------------------------------------------------------------
int main()
{
  bool Once = true;
 
  Start:
    cout << "Checking bool Once..." << endl;
    if (Once) {
      goto TrueOnce;
    } else {
      goto FalseOnce;
    }
 
  TrueOnce:
    cout << "Once = true..." << endl;
    Once = false;
    goto Start;
 
  FalseOnce:
    cout << "Once = false..." << endl;
 
  cout << "Shutting Down Application" << endl;
  system("pause");
 
  return 0;
}
//---------------------------------------------------------------------------

#include <iostream>
 
int main()
{    
    std::cout << "one two "
    "three\n";
        
    return 0;
}

//---------------------------------------------------------------------------
#include <iostream>
using namespace std;
//---------------------------------------------------------------------------
class Test
{
  public:
    Test(int NewSize) { Size = NewSize; };
    ~Test() { };
    void SetSize(int NewSize) { Size = NewSize; };
    int GetSize() { return Size; };
  private:
    int Size;
};
//---------------------------------------------------------------------------
Test &TestObject()
{
  Test *pTestObject = new Test(5);
  int Size = pTestObject->GetSize();
  cout << Size;
  return *pTestObject;
}
//---------------------------------------------------------------------------
int main()
{
  Test &rTestObject = TestObject();
  int Size = rTestObject.GetSize();
  cout << Size << endl;
 
  Test *pTestObject = &rTestObject;
  delete pTestObject;
 
  system("pause");
  return 0;
}
//---------------------------------------------------------------------------

  Test *pTestObject = &rTestObject;
  delete pTestObject;

int main()
{
  Test *rTestObject = &TestObject();
  int Size = rTestObject->GetSize();
  cout << Size << endl;
  delete rTestObject;
 
  system("pause");
  return 0;
}

#include "stdafx.h"
//---------------------------------------------------------------------------
#include <iostream>
using namespace std;
//---------------------------------------------------------------------------
class Test
{
  public:
    Test(int NewSize) { Size = NewSize; };
    ~Test() { };
    void SetSize(int NewSize) { Size = NewSize; };
    int GetSize() { return Size; };
  private:
    int Size;
};
//---------------------------------------------------------------------------
Test &TestObject()
{
  Test pTestObject(5);
  return pTestObject;
}
//---------------------------------------------------------------------------
int main()
{
  Test &rTestObject = TestObject();
  int Size = rTestObject.GetSize();
  cout << Size << endl;
 
  system("pause");
  return 0;
}
//---------------------------------------------------------------------------

Test TestObject()
{
  Test pTestObject(5);
  return pTestObject;
}
//---------------------------------------------------------------------------
int main()
{
  Test &rTestObject = TestObject();
  int Size = rTestObject.GetSize();
  cout << Size << endl;
 
  system("pause");
  return 0;
}