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

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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 "longnumber.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();

        // 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
    }

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