skip function parameter

[mattia]

Hello,
if i have a function like this:

bool funz ( QString name , QString * lastname );

sometime i need to skip lastname parameter, what should i declere it?
I usually do in this way when i dont have to handle pointer:

bool funz ( QString name , QString lastname = "" );

I tried to do in this way:

bool funz ( QString name , QString * lastname = NULL );

but it doesn't work....
thanks

[jpn]

What does "doesn't work" mean? A compiler error? If so, paste it.

[mattia]

my function in .h file:

bool funz( twmConfigTerminalItemStruct* twmConfigTerminalItem , QString theIPAddress = "" , QString * stringToReturn = NULL );

bool funz( twmConfigTerminalItemStruct* twmConfigTerminalItem , QString theIPAddress = "" , QString * stringToReturn = NULL );

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my function in .cpp file:

bool twmCommunicationObject::funz ( twmConfigTerminalItemStruct* twmConfigTerminalItem , QString theIPAddress , QString * stringToReturn )

bool twmCommunicationObject::funz ( twmConfigTerminalItemStruct* twmConfigTerminalItem , QString theIPAddress , QString * stringToReturn )

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i call it in my Main in this way:

funz ( twmConfigTerminalItemStruct* twmConfigTerminalItem )

funz ( twmConfigTerminalItemStruct* twmConfigTerminalItem )

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and i get a segmentation fault...

[jpn]

Perhaps you're missing a sufficient check for null pointer?

if (stringToReturn != NULL)
{
   *stringToReturn = "foo";
}

if (stringToReturn != NULL)
{
   *stringToReturn = "foo";
}

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I'm sorry I'm afraid there's not much we can say about it with that amount of information. Just compile the app in debug mode and run it via gdb whenever you get such crashes you don't understand.

[mattia]

it doen't work....but i solved it using overloading
thx