Thread: Another pointers / struct/ array related question

First of all let me say thank you for this wonderful forum for all the help, I am learning a lot here.
In my Gomoku game, I have most of the functions and static variables inside the main.c file. but I h ave decided to make a seperate .h and .c files for the Transposition table functions. My transpostion table is actually an array of pointers to structs. this struct type represents an entry in the table and holds all the relevant information (score,valueType,depth etc.)
The transposition table itself is instantiated in the main file as a static member, and only passed to the insert() and find() operations in the TT.c file as a reference (pointer).
I am initiating the table with all pointers as 0 (NULL) ...actually that the reason i chose to use pointers to struct, so i can make them all NULL .

The problem is, in the alpha beta function, where i try to get something from the table, I get 0 results.. that's probably means that all the entries are still NULL even after i insert something to a certain index in the table. this is the insert() function, am i doing it right? can i define a struct inside a function and assign its pointer to my static table? from some reason it doesn't work.

This is the relevant function, let me know if you need something more

Code:

void insert(unsigned long long key,int value,int valueType,int depth,Entry **table){
    int index = compress(key);
    Entry entry;
    entry.key = key;
    entry.value = value;
    entry.valueType = valueType;
    entry.depth = depth;
    table[index] = &entry;
}

Entry entry is a local object; after the function returns that variable/object no longer exists so storing a pointer to entry is invalid (because, well, what's it point to after entry stops existing?) You probably want to dynamically allocate entry using malloc.