i am trying to write a program in order to learn how to work with trees and especially 2-4 trees.
the general idea is that each node is represented by 4 cells and 5 pointers? (maybe 2 arrays then? )
let's suppose that we insert simply int numbers in all cells.
firstly we initialize the root (==null ? )
then we fill up all 4 cells of the first node and we must have its 4 int numbers in numerical order?and what happens when we want to insert a 5th element?

of course i don't expect every question answered(as there is only 1 total answer i suppose) but a brief explanation would really help.maybe a link to a tutorial would also be very helpful.


//important: how can i separate internal nodes from leaf nodes?let's suppose that each pointer in the leaf level must point to another array(one level lower that is)which may contain also 4 cells with another type(int or char * etc)...how can i write and create this separation?maybe two structs or can i do that with just one struct and flag variables?