#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;


  /* begin 'a' */
  while ( bittst(j,5) ) {   
   j++;
  }
  /* end 'a' */

  /* begin 'b' */
  for (j=0; j != 10; j++) {  
   k = k + i;
   i = k - i;
  }
  /* end 'b' */


  /* begin 'c' */
 do {                     
  k--;
  } while (! bittst (k,3));

 /* end 'c' */

 /* begin 'd' */
 if (k < j) {    
   i++;
 } else {
   j++;
 }
 /* end 'd' */

 /* begin 'e' */
 if (i > k) {
  k--;
 } else {
   j--;
 }
 /* end 'e' */


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

}

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