Bit shifting in C - logical vs arithmetic shifts

#include <stdio.h>
int main ()
{
  unsigned  int x = 0xf0001111;
            int y = 0xf0001111;
  printf("%08x \n", x);

  printf("shifting as unsigned value: %08x \n", x >> 4);
  //int y = 0xf0001111;
  printf("shifting as SIGNED value:   %08x \n", y >> 4);

  return 0;
}



/*
f0001111
0f000111
ff000111
*/