set_callback (c++)

[Andreas Hehn]

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Hi!

I have a problem using a callback function for the output of the
train_on_data with the c++-wrapper of fann-2.1.0 using VC++6.

I create a Neural Net 'nnet' within a class 'MyClass' where i defined
following methods:


void MyClass::train()
{
...
void *me = (void*)this;
nnet.set_callback(print_callback,me);
...
}

void MyClass::print_train_state(unsigned int epochs)
{
...
}


Outside of all classes and stuff, i wrote:

int print_callback(FANN::neural_net &net, FANN::training_data &train,
unsigned int max_epochs, unsigned int epochs_between_reports, float
desired_error, unsigned int epochs, void *user_data)
{
((MyClass*)user_data)->print_train_state(epochs);
return 0;
}

My Problem is 'me' and 'user_data' are not the same, and the program
doesn't jump to the Instance of MyClass. Where is the mistake?
Any ideas?

Regards,

Andreas Hehn
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