#include <stdio.h>
 
void print_binary(unsigned int number, int size) // Size is in bits
{
//   if (!number)
//   {
//     putc('0', stdout);
//     return;
//   }
  if (size == 1)
  {
    putc((number & 1) ? '1' : '0', stdout);
    return;
  }
  print_binary(number >> 1, size - 1);
  putc((number & 1) ? '1' : '0', stdout);
}

int main(void) {
	print_binary(42,8); // 1st argument: Number; 2nd argument: Size in bits
	printf("\n");
	print_binary(0, 32);
	printf("\n");
	print_binary(-12,32);
	printf("\n");
	return 0;
}