TB10.1 Example Applications: examples/Base/ArraysAndLists/linkedlist/sgllist/src/sgllist.cpp Source File

00001 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+00002 // All rights reserved.
+00003 // This component and the accompanying materials are made available
+00004 // under the terms of "Eclipse Public License v1.0"
+00005 // which accompanies this distribution, and is available
+00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
+00007 //
+00008 // Initial Contributors:
+00009 // Nokia Corporation - initial contribution.
+00010 //
+00011 // Contributors:
+00012 //
+00013 // Description:
+00014 // Contains the E32Main() function, which executes the example.
+00015 // The example demonstrates the use of the TSglQue class, which represents
+00016 // a singly linked list.
+00017 // The user enters a long number, which is stored as linked list of digits
+00018 // of the number. The user can edit this number by adding digits to the list
+00019 // or removing digits from the list.
+00020 // The example displays the sum of all digits of this number on the console.
+00021 //
+00022 
+00023 
+00024 
+00029 #include "adder.h"
+00030 
+00031 LOCAL_D CConsoleBase* console;
+00032 
+00033 LOCAL_C void DoStartL();
+00034 LOCAL_C void CallExampleL();
+00035 
+00036 LOCAL_C void DoStartL()
+00037         {
+00038         // Create and install the active scheduler.
+00039         CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
+00040         CleanupStack::PushL(scheduler);
+00041         CActiveScheduler::Install(scheduler);
+00042 
+00043         // Create an object of the CLongNumber class.
+00044         CLongNumber* number = CLongNumber::NewL(console);
+00045         CleanupStack::PushL(number);
+00046 
+00047         // Read the number from the user.
+00048         _LIT(KTextEnterNumber,"Singly linked list example.\nEnter the digits of a number...\n");
+00049         console->Printf(KTextEnterNumber);
+00050         // Generate an asynchronous read request.
+00051         number->ReadNumber();
+00052 
+00053         // Start the active scheduler.
+00054         CActiveScheduler::Start();
+00055 
+00056         // Create an object of the CAdder class.
+00057         CAdder* adder = CAdder::NewL(number);
+00058         // Add all the digits of the number and print the sum.
+00059         _LIT(KTextSum,"Sum of all digits of the number : %d\n");
+00060         console->Printf(KTextSum,adder->Add());
+00061         delete adder;
+00062 
+00063         // Destroy the objects in the cleanup stack.
+00064         CleanupStack::PopAndDestroy(2,scheduler); // number, scheduler.
+00065         }
+00066 
+00067 GLDEF_C TInt E32Main() // main function called by E32
+00068     {
+00069         __UHEAP_MARK;
+00070         CTrapCleanup* cleanup=CTrapCleanup::New(); // get clean-up stack
+00071         TRAPD(error, CallExampleL()); // more initialization, then do example
+00072         delete cleanup; // destroy clean-up stack
+00073         __ASSERT_ALWAYS(!error, User::Panic(KTxtEPOC32EX, error));
+00074         __UHEAP_MARKEND;
+00075         return 0; // and return
+00076     }
+00077 
+00078 LOCAL_C void CallExampleL() // initialize and call example code under cleanup stack
+00079     {
+00080         console=Console::NewL(KTxtExampleCode, TSize(KConsFullScreen, KConsFullScreen));
+00081         CleanupStack::PushL(console);
+00082         TRAPD(error, DoStartL()); // perform example function
+00083         if (error)
+00084                 console->Printf(KFormatFailed, error);
+00085         else
+00086                 console->Printf(KTxtOK);
+00087         console->Printf(KTextPressAnyKey);
+00088         console->Getch(); // get and ignore character
+00089         CleanupStack::PopAndDestroy(); // close console
+00090     }
+