Bitfields in C programming language

Question

How to access entire structure members in C.Means I want to take all the data of variables in structure.

struct data
{
char a:1;
char b:2;
char c:3;
char d:1;
} arr;

I can access individual members by using . operator.But i need to access all members in that structure.Colud you please tell me how to do.

Answer 1

As suggested make an union of the whole data and of the bitfield structure.

union
{
    char Whole;
    struct data
    {
        char a:1;
        char b:2;
        char c:3;
        char d:1;
    } arr;
} MyData;