[Dev-C++] Problems with function pointers inside a class

[<cg...@wo...>]

  Hi:
I am trying to use the title of the message.
I declare:
class{
...

typedef void (classname::*funny)(void**);  //I tried either void 
(classname::*function[19])(void**);
funny *function; OR funny function[19];
};

Then
class::class(){
function = new funny[19];
function[0] = &class::function1_name;
:
function[18] = &class::function19_name;
}


Then inside another function:
int cuantos = rand() % 19;
(this->*function[cuantos])(NULL);
                                           ^-- Or &void_pointer_*,  or 
void_pointer_**, or (void**)int_pointer_**, set to NULL or not 
initialized or initialized.
I read this is the correct way for doing this, and 
(this->*function[cuantos]) is the only syntax the compiler accepts.
When it's time to use the function it crashes.
Right now all the functions are:

void class::functionx(void** tas){
cout << "functionx" << endl;
}

What I see in my code is done as "Thinking in C++" says it must be done.