assign value to pointer that points to array of pointers

Question

I have an array of int pointers

int * arr[3];

If I want to define a pointer to arr, I can do the following:

int * (*p)[] = &arr;

However, in my code, I need to first declare that pointer:

int *(*p)[];

My question is, how to assign &arr to it after it has been declared. I have tried (*p)[] = &arr; but that didn't work.

You might have to include a code example and show what exactly that didn't work. (int* (*)[] is a pointer to incomplete array type, so that can be an issue in some contexts. — Lundin
– Lundin, Commented Nov 8, 2021 at 10:19

Guillaume Petitjean · Accepted Answer · 2021-11-08 09:59:51Z

2

You can simply do p = &arr.

Try here.

answered Nov 8, 2021 at 9:59

Guillaume Petitjean

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Imeguras · Accepted Answer · 2021-11-08 10:10:19Z

0

If you want to assign p to arr you simply have to do p = &arr; this is because when you write p you basically are saying to C: this is the pointer to a array of pointers

So when you &arr you get the same type as & gives you the pointer to the variable next to it

Also beware that if you want the value of a variable inside a struct that its pointed to( ie struct something *a, where inside there int i) you put a -> (making it a a->integer;)

You should update the answer to the full extent

answered Nov 8, 2021 at 10:10

Imeguras

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