Array pointer as function argument?

Hello,

I have been asked to implement a method

Code:

---

void word_not(lc3_word_t *R, lc3_word_t *A)

---

which, as you can see, takes 2 pointers to a array of BITS, defined as follows:

Code:

---

typedef enum {
    ZERO = (uint8_t) 0, ONE = (uint8_t) 1
} BIT;

typedef BIT lc3_word_t[16];

---

The main method invokes the function:

Code:

---

word_not(&result, &a_value)

---

which passes the address of two lc_word_t types to word_not. The function is supposed to negate each bit in a_value (NOT function) and write it into the corresponding bit in result.

What should I put in the body of word_not to accomplish this? I begin by looping from 0 to 15 (a total of 16 times, the length of the word type), but I am not sure how to check & store elements in arrays when I am given only pointers (addresses?) to the arrays. I am very confused what the data fields for the pointer arugments look like when addresses are passed into them.

I have tried different things like making BIT pointers (BIT *) but when I print the contents of result it always appears to have addresses instead of BITs. What should I do?

Quote:

---

Originally Posted by mtn_student

... What should I do?

---

I would suggest you learn about pointers. Specifically, pointers to pointers. Take a look at Prelude's Pointer Tutorial.