#include <stdio.h>
void printBits( void *ptr );



int main(int argc, char *argv[] )
{
   int a, b;

   a = 2;
   printf("main: a = %d , in binary: ", a);
   printBits(&a);
   printf("\n");

   b = f(a);

   printf("main: b = %d , in binary: ", b);
   printBits(&b);
   printf("\n\n");
}







/* -------------------------------------
   Print bit representation
   ------------------------------------- */
void printBits( void *ptr )
{
   int x = *((int *)ptr);
   int i;

   for ( i = 31; i >= 0; i-- )
   {
      if ( (x & (1 << i)) != 0 )
         printf("1");
      else
         printf("0");
   }
}