Help with Structure

[min2max]

I need to dynamically create a new Memo structure to hold memoized fib #'s

I have two structures

typedef struct HugeInteger
{
    //array to hold the digits of a huge integer
    int *digits;


    //number of digits in the huge integer
    int length;
} HugeInteger;

typedef struct Memo
{
    // dynamically allocated HugeInteger array to store fib #'s
    struct HugeInteger *F;


    // current length of this array
    int length;
} Memo;

So far my code for creating the new memo is the following..

Memo *createMemo(void){


    int i;


    Memo *memo;
    memo=(Memo*)malloc(sizeof(Memo));


    if(memo == NULL)
        panic("ERROR: out of memory in createMemo()\n");


        memo->F = (HugeInteger*)malloc(sizeof(HugeInteger)*INIT_MEMO_SIZE);


    if(memo->F == NULL)
        panic("ERROR: out of memory in createMemo()\n");


        memo->length = INIT_MEMO_SIZE;


    HugeInit(memo->F, 0);
    HugeInit(memo->F, 1);


    for(i=1; i<INIT_MEMO_SIZE; i++)
        {
            F->digits[i] == NULL;
        }
            F->length = 0;

    return memo;

}

I am having trouble with initializing the struct inside of the new Memo, I need the digit fields to null and the length field to 0 to indicate that F[i] has not yet been memoized...I have F->digits and F->length in the for loop but this just simply doesn't work...
Please point me in the right direction so I can get this initialized...Thank you!

[std10093]

for(i=1; i<INIT_MEMO_SIZE; i++)
        {
            F->digits[i] == NULL;
        }
            F->length = 0;

No, you have not F->length inside the loop, but I think that is correct and you did not wanted to write that "and F->length in the for loop" above.

First of all, are you sure that the loop is running? Why it starts from 1 instead of 0? Place a printf("%d\n", i); to see how many times the loop is executed.

[rcgldr]

I don't know what these functions do:

/* ... */
    HugeInit(memo->F, 0);
    HugeInit(memo->F, 1);

The code to initialize *memo should look like this. Note that will be no instances of HugeInteger after doing this initialization. You'll need additional code to allocate and set the pointers and lengths for instances of HugeInteger.

/* ... */
    for(i=0; i < INIT_MEMO_SIZE; i++)
        memo->F[i] = NULL;
    memo->length = 0;