accessing a structure inside a structure

[Raju K V]

hi all,

I have 2 structure of as follows:

struct a
{
        int x;
        void *y;
};

struct b
{
        char *u;
        int v;
        float z;
};

and in my code I write as

main()
{
        struct a a1;
        struct b b1;
        .
        .
        b1.u = "hello";
        b1.v = 10;
        b1.z = 20.1;
        .
        .
        a1.y = (struct b *)&b1;
        . 
        .
        fun(&a1);
        .
        .
}

fun(struct a *x1)
{
        struct b y1;
        .
        .
        y1 = (struct b *)x1;
        printf("%s\n",y1.u);
        .
        .
}

what I want to know is that is it possible to access the struct b
component in struct a without using the temperory variable y1?

Thanks and regards,
Raju