Alright, so I'm trying the following:

Code:
// some function
void doSomething(void)
{
   draw_text("Doing something",20,20,vector(255,255,255));
}

// some struct
typedef struct someStruct
{
   void myFunction(void);

}someStruct;

someStruct* myStruct = 
{
  myFunction = doSomething;
}

// a main void
void main()
{
   while(1)
   {
      if(key_j)
         myStruct.myFunction();
        
      wait(1);   
    }
}


So, obviously I'm trying to use a function pointer as a member of my struct to be able to have different instances of that struct calling different functions.

However, running this, first of all, I get a compiling error (wrong number/type of parameters) for my function call in the main function; If I replace

myStruct.myFunction();

with

myStruct.myFunction(NULL);

it compiles, however as I press "j" I get a "crash in main: SYS" error message.

So, now I'd like to know, how can I use function pointers as members of a struct, and how can I call these functions without crash?
Thanks in advance.