====== C++ Crashkurs / Übung 10 ======

Exceptions.

**Ueb5a.h:**

<code c++>
// File : Ueb5a.h
//

#include "..\stdafx.h"

#include <memory>

#include "Ueb5a.VerketteteListe.h"

using namespace Ueb5a;

#include <list>

void Test ()
{
	CListe<int>* pListe= new CListe<int>();

	try
	{
		pListe->ElementAnhaengen(4711);
		pListe->ElementAnhaengen(815);
		pListe->ElementAnhaengen(42);
		pListe->ElementAnhaengen(0);

		std::cout << "Liste iteriert mit prefix-operator:" << std::endl;
		for (auto iter2 = pListe->begin(); iter2 != pListe->end(); ++iter2)
		{
			std::cout << "    " << *iter2 << std::endl;
		}
	}
	catch (std::string ex) // Exceptions vom Typ std::string fangen
	{
		std::cerr << "Exception: " << ex.c_str() << std::endl;
		auto s = std::string("Ein Fehler in ");
		s += ((const char*) __FUNCTION__);
		s += "aufgetreten.";
		throw s; // Exception werfen
		//throw; // Ohne Argumente gibt einfach die urspruengliche Exception weiter
	}

	delete pListe;
}

int _ueb (int argc, _TCHAR* argv[])
{
	try
	{
		Test();
	}
	catch (...) // Exceptions beliebiger Typs fangen
	{
		std::cerr << "Im Programm ist irgendein Fehler aufgetreten..." << std::endl;
	}

	return 0;
}

// EOF
</code>

**Ueb5a.VerketteteListe.h:**

<code c++>
// File : Ueb5a.VerketteteListe.h
//

namespace Ueb5a
{
	template<class TElement>
	class CListe
	{
	private:
		class CListenElement
		{
		friend CListe;

		private:
			TElement nInhalt;
			std::shared_ptr<CListenElement> pNaechster;

		public:
			CListenElement (TElement newInhalt)
			{
				int iTmp;

				nInhalt = newInhalt;

				iTmp = 100 / nInhalt; // Exception provozieren
				if (iTmp > 0) iTmp++;
			}

			~CListenElement ()
			{
			}

			TElement GetInhalt ()
			{
				return nInhalt;
			}

			std::shared_ptr<CListenElement> GetNaechster()
			{
				return pNaechster;
			}
		};

		class CListeIterator
		{
		private:
			CListenElement* element;

		public:
			CListeIterator (CListenElement* pElem)
			{
				element = pElem;
			}

			bool operator!=(CListeIterator another)
			{
				return (this->element != another.element);
			}

			CListeIterator& operator++()
			{
				element = element->GetNaechster().get();

				return *this;
			}

			TElement operator*()
			{
				return element->GetInhalt();
			}
		};

	public:
		std::shared_ptr<CListenElement> pStart;

		CListe ()
		{
		}

		CListe (const CListe& other)
		{
			for (auto iter = other.begin(); iter != other.end(); ++iter) ElementAnhaengen(*iter);
		}

		CListe& operator=(const CListe& other)
		{
			pStart = nullptr;

			for (auto iter = other.begin(); iter != other.end(); ++iter) ElementAnhaengen(*iter);

			return *this;
		}

		CListeIterator begin () const
		{
			return CListeIterator(pStart.get());
		}

		CListeIterator end () const
		{
			return CListeIterator(nullptr);
		}

		void ElementAnhaengen (TElement nInhalt)
		{
			if (nInhalt == 0) throw std::string("DIV0"); // Exception werfen

			auto pNeu = std::make_shared<CListenElement>(nInhalt);

			if (pStart == nullptr)
			{
				pStart = pNeu;
			}
			else
			{
				auto pLetztes = pStart;
				while (pLetztes->GetNaechster() != nullptr) pLetztes = pLetztes->GetNaechster();
				pLetztes->pNaechster = pNeu;
			} // if
		}

	};
}

// EOF
</code>


**Programm.cpp:** - Der Einstiegspunkt

<code c++>
// Programm.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include "Ueb5a.h"

int _tmain (int argc, _TCHAR* argv[])
{
	return _ueb(argc, argv);
}

// EOF
</code>

**stdafx.h:**

<code c++>
// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//

#pragma once

#include "targetver.h"

#include <stdio.h>
#include <tchar.h>

// TODO: reference additional headers your program requires here

#include <malloc.h>
#include <iostream>

// EOF
</code>

**targetver.h:**

<code c++>
// Including SDKDDKVer.h defines the highest available Windows platform.

// If you wish to build your application for a previous Windows platform, include WinSDKVer.h and
// set the _WIN32_WINNT macro to the platform you wish to support before including SDKDDKVer.h.

#pragma once

#include <SDKDDKVer.h>
</code>

----
Stand: 19.09.2014
 --- //[[feedback.jk-wiki@kreick.de|: Jürgen Kreick]]//

EOF