examples/Base/ArraysAndLists/linkedlist/sgllist/src/sgllist.cpp

Go to the documentation of this file.

/*
Copyright (c) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of Nokia Corporation nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Description:
Contains the E32Main() function, which executes the example.
The example demonstrates the use of the TSglQue class, which represents
a singly linked list.
The user enters a long number, which is stored as linked list of digits
of the number. The user can edit this number by adding digits to the list
or removing digits from the list.
The example displays the sum of all digits of this number on the console.  
*/



#include "adder.h"

LOCAL_D CConsoleBase* console;

LOCAL_C void DoStartL();
LOCAL_C void CallExampleL();

LOCAL_C void DoStartL()
        {
        // Create and install the active scheduler.
        CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
        CleanupStack::PushL(scheduler);
        CActiveScheduler::Install(scheduler);

        // Create an object of the CLongNumber class.
        CLongNumber* number = CLongNumber::NewL(console);
        CleanupStack::PushL(number);

        // Read the number from the user.
        _LIT(KTextEnterNumber,"Singly linked list example.\nEnter the digits of a number...\n");
        console->Printf(KTextEnterNumber);
        // Generate an asynchronous read request.
        number->ReadNumber();

        // Start the active scheduler.
        CActiveScheduler::Start();

        // Create an object of the CAdder class.
        CAdder* adder = CAdder::NewL(number);
        // Add all the digits of the number and print the sum.
        _LIT(KTextSum,"Sum of all digits of the number : %d\n");
        console->Printf(KTextSum,adder->Add());
        delete adder;

        // Destroy the objects in the cleanup stack.
        CleanupStack::PopAndDestroy(2,scheduler); // number, scheduler.
        }

GLDEF_C TInt E32Main() // main function called by E32
    {
        __UHEAP_MARK;
        CTrapCleanup* cleanup=CTrapCleanup::New(); // get clean-up stack
        TRAPD(error, CallExampleL()); // more initialization, then do example
        delete cleanup; // destroy clean-up stack
        __ASSERT_ALWAYS(!error, User::Panic(KTxtEPOC32EX, error));
        __UHEAP_MARKEND;
        return 0; // and return
    }

LOCAL_C void CallExampleL() // initialize and call example code under cleanup stack
    {
        console=Console::NewL(KTxtExampleCode, TSize(KConsFullScreen, KConsFullScreen));
        CleanupStack::PushL(console);
        TRAPD(error, DoStartL()); // perform example function
        if (error)
                console->Printf(KFormatFailed, error);
        else
                console->Printf(KTxtOK);
        console->Printf(KTextPressAnyKey);
        console->Getch(); // get and ignore character
        CleanupStack::PopAndDestroy(); // close console
    }

---