Thread: Allocating memory to a structure

I want to allocate memory to a structure which is a member of another structure. I can find many examples online how to allocate memory to an array of structures or a structure pointer, but what I have now is just one structure corr as a member of structure bbb.

bbb is an array of structures within the structure aaa

Code:

struct bbb
{
int x;
int y;
struct corr ccc;
}

I have allocated memory to all bbb structures and I now want to allocate memory to:

Code:

 aaa->bbb[co_b].ccc

I have tried all of the following and every time I get a compiling error:

Code:

if ((&aaa->bbb[co_b].ccc = (struct corr*) malloc(sizeof (struct corr))) == NULL) {
        return EXIT_FAILURE;
    } 


if ((aaa->bbb[co_b].ccc = (struct corr*) malloc(sizeof (struct corr))) == NULL) {
        return EXIT_FAILURE;
    }

if ((aaa->bbb[co_b].ccc = (struct corr*) malloc(sizeof (struct corr*))) == NULL) {
        return EXIT_FAILURE;
    }

The first one gives the error lvalue required as left operand of assignment.

The last two give the error: incompatible types when assigning to type ‘struct corr’ from type ‘corr *’

What would be the correct way to allocate memory to a structure in this case? Thank you!