c - C: Incompatible type on dynamic array of pointers of structure

Question

I need help to declare a dynamic array of pointers. A read some articles and similar questions about it and I try to do it for my project but still frozen.

What I'm trying to do:

typedef struct recArmario Armario, *pArmario;

struct recArmario {
    int ID;
    pArmario next;
    pArmario prev;
    pCorredor parent;
};

pArmario auxArmarioTest1 = malloc(sizeof(Armario));
auxArmarioTest1->ID = 1;
pArmario auxArmarioTest2 = malloc(sizeof(Armario));
auxArmarioTest2->ID = 2;

(…)

//Dynamic array of pointer Armario:
pArmario arrArmariosPointers = malloc(sizeof(pArmario) * maxCorredores);
//Here is my doubt
*(arrArmariosPointers + idCorredor) = auxArmarioTest1;

Xcode is saying:

Assigning to 'struct recArmario' from incompatible type 'pArmario' (aka 'struct recArmario *'); dereference with *

I don't understand, "Assigning to 'struct recArmario'"?! I declare one array of pArmario, I think so.

*(arrArmariosPointers + idCorredor) is equivalent to arrArmariosPointers[idCorredor], right?

UPDATE 1:

Thanks for the answers! I update my sample and still have problems.

pArmario auxArmarioTest1 = malloc(sizeof(Armario));
auxArmarioTest1->ID = 1;
pArmario auxArmarioTest2 = malloc(sizeof(Armario));
auxArmarioTest2->ID = 2;

//Dynamic array of pointer Armario:
pArmario arrArmariosPointers = malloc(sizeof(pArmario) * 5);
//Test
pArmario auxA;
auxA = arrArmariosPointers + 0; //I know, it's useless :)
auxA = auxArmarioTest1;
auxA = arrArmariosPointers + 1;
auxA = auxArmarioTest2;

printf("\nA%d",(arrArmariosPointers+0)->ID);
printf("\nA%d",(arrArmariosPointers+1)->ID);

free(auxArmarioTest1);
free(auxArmarioTest2);

The result I get is:

A0
A0

What I'm doing wrong, again?

UPDATE 2:

Forget my update 1, it was dumb. I'm just changing auxA.

SOLUTION:

pArmario* arrArmariosPointers = malloc(sizeof(pArmario) * 5);

arrArmariosPointers[0] = auxArmarioTest1;
arrArmariosPointers[1] = auxArmarioTest2;

printf("\nA%d",arrArmariosPointers[0]->ID);
printf("\nA%d",arrArmariosPointers[1]->ID);

Thanks everyone.

score 3 · Accepted Answer

*(arrArmariosPointers + idCorredor) = auxArmarioTest1;

here arrArmariosPointers + idCorredor is a pArmario or struct recArmario *, dereferencing it give you a struct recArmario which you then assign to auxArmarioTest1 which is a struct recArmario *. In short, you are assigning a pointer to a struct, thus the error

for your update 1, this may be what you are trying to achieve?

pArmario * arrArmariosPointers = malloc(sizeof(pArmario) * 5);
arrArmariosPointers[0] = auxArmarioTest1;
arrArmariosPointers[1] = auxArmarioTest2;

printf("\nA%d",(arrArmariosPointers[0])->ID);
printf("\nA%d",(arrArmariosPointers[1])->ID);

score 1 · Accepted Answer

The type of the dynamic array variable is wrong. You're missing a pointer:

pArmario* arrArmariosPointers = malloc(sizeof(pArmario) * maxCorredores);

score 1 · Accepted Answer

This:

pArmario auxArmarioTest1

Is a pointer to a struct recArmario, this:

pArmario arrArmariosPointers

is the exact same thing. So if you dereference a pointer to a struct you'd have a struct.

Thus this code is:

*(arrArmariosPointers + idCorredor) = auxArmarioTest1;
^      ^                   ^                   ^
|      |                   |                   |
| array of pointers  +   some offset           |
|   to structs          into the array         |
|                                              |
dereference the result, so now we can          |
assign a struct                                |
                                        but here's a problem
                                       we're trying to give it a pointer
                                       to a struct.

So the answer to your question is yes:
*(arrArmariosPointers + idCorredor) is equivalent to arrArmariosPointers[idCorredor]

But what you really wanted was:

pArmario* arrArmariosPointers = malloc(sizeof(pArmario) * maxCorredores);
   ^    ^
   |    |
   |    +-- pointer to (array of)
   pointers to structs

c - C: Incompatible type on dynamic array of pointers of structure

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