C Programming - Structures, Unions, Enums - Discussion

@Arun Prasad nice explanation.

Bit fields are usually in contagious locations which are represent variables in bits format so to create an array it should be taken by a pointer but they are of bytes type so cannot form an array of bits. (i just assumption only).

It's not clear. Please explain me.

Whenever we dealing with a bit field must and should be mention unsigned otherwise its takes the first bit as a signed bit(+ or -).

In this, it is not possible to declare a float, scan f [bcz scan f need &(address) and in this, we can't print address also] and also not use the size of operator.

Didn't understand. Please explain me.

Why bit field must be integral type?

What is bit field?

Bit Fields must have integral type. We cannot define an array of bit fields. Because arrays are working like pointers. For ex. *(a+i). Pointers can access memory in Bytes. It requires min. memeory 1 byte like char variable. But it can't access bit memory. That's why we never use pointers in bit fields. we can declare a bit field as

struct a
{
int a:3;
int b:5;
};

but we can't declare it as
struct a
{
int a[2]:5; // bit field must be integral type.
};

struct taxonomy {
int kingdom : 12;
int phylum : 6;
int genus : 2;
};

The following structures has three bit-field members kingdom,phylum,genus occupying 12,6 and 2 bits fields.

The above example will provide you a brief explanation of array of bit-fields.

What do this question means?

Array of bitfields?