#define bitset(var,bitno) ((var)|=(1<<(bitno)))
#define bitclr(var,bitno) ((var)&=~(1<<(bitno)))
#define bittst(var,bitno) (var & (1 << (bitno)))

unsigned char i,j,k;

main()
{

   i = 0x24;  j = 0xC5;  k = 0x4D;
  i++;   /* a, increment */
  j--;   /* b, decrement */
  k = j | i;  /* c, bitwise OR */
  i = i >> 3;  /* d, right shift by 3 */
  j = j << 2;  /* e, left shift by 2 */
  j = j & 0x30; /* f, bitwise AND */
  k = ~k;      /* g, bitwise negation */
  k = k ^ j;    /* h, bitwise XOR */ 
  i = i - j;   /* i , subtraction */
  k = k + j;  /* j , addition */
  i = bitset(i,3);   /* k, set a bit to '1' */
  j = bitclr(j,5);   /* l, clear a bit to '0' */

  printf ("i: %x, j:  %x, k: %x\n",i,j,k);

}




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