Bit twiddling

Hi,
I have written a couple of programs which just prints the bits in both directions.Would appreciate any help to refine them a bit.

1.
#include<stdio.h>
#include<limits.h>
void printbits_reverse(unsigned char a){
        int i;
        for(i=0 ; i < CHAR_BIT ; i++)
                ((0x1<<i) & a) ? printf("1") : printf("0"); }
int main()
{
        unsigned char a = 0x96;
        printbits_reverse(a);
        return 0;
}

Now here the loop dosent look the best of code.How can I refine it to better and generic code ?

2.
#include<stdio.h>
struct twid{
        unsigned :24; /* skip bits 31 -> 8 for big-endian machines */
        unsigned bit1:1;
        unsigned bit2:1;
        unsigned bit3:1;
        unsigned bit4:1;
        unsigned bit5:1;
        unsigned bit6:1;
        unsigned bit7:1;
        unsigned bit8:1;
};

void print(struct twid *tw)
{
        tw->bit1?printf("1"):printf("0");
        tw->bit2?printf("1"):printf("0");
        tw->bit3?printf("1"):printf("0");
        tw->bit4?printf("1"):printf("0");
        tw->bit5?printf("1"):printf("0");
        tw->bit6?printf("1"):printf("0");
        tw->bit7?printf("1"):printf("0");
        tw->bit8?printf("1"):printf("0");
        printf("\n");
}

int main()
{
        unsigned val = 0x96;
        struct twid *tw = (struct twid *) &val ;
        print(tw);
        return 0;
}

This is not a generic code ( a bit platform specific), but that long list of printf's in the print function isnt again a very decent way.Can I use a loop or any construct to print the values ?

TIA,
.