#include <stdio.h>
main()
{
char B=0;
int i;

printf("%d\n\n", B);
B=B | (1<<4) ; /*set 4th bit*/
printf("%d\n\n", B);

/* print all bits */
for (i=7; i>=0; i--)
	printf("%d ", (B&(1<<i))>>i) ;
printf("\n\n");

B=B & (~(1<<4)) ; /*clear 4th bit*/
printf("%d\n\n", B);
}