Invalid type argument of -> C structs

Question

I am trying to access items in an array of structs and print the structs fields as follows

printList(Album *a, int numOfStructs)
{
    int i;
    int j;

            


        

Answer 1

a is of type Album* which means that a[i] is of type Album (it is the ith element in the array of Album object pointed to by a).

The left operand of -> must be a pointer; the . operator is used if it is not a pointer.

Answer 2

You need to use the . operator. You see, when you apply a * to a pointer, you are dereferencing it. The same goes with the []. The difference between * and [] is that the brackets require an offset from the pointer, which is added to the address in the pointer, before it is dereferenced. Basically, these expressions are identical:

*ptr == ptr[0]
*(ptr + 1) == ptr[1]
*(ptr + 2) == ptr[2]

To connect to your question: Change a[i]->field2 and a[i]->field3 to a[i].field2 and a[i].field3.