When x>>1 and x/2 gives different result in C/C++?

Question

struct marks {
  int a:1;
  int b:2;
};

int main() {
  struct marks obj={1,6};
  printf("%d %d\n",obj.b,obj.a);
}

Answer 1

For positive integers x>>1 and x/2 would be same but for negative its not see the example

x=5
x>>1 is 2
x/2 is also 2

if
x=-5
x/2 is -2
but x>>1 is -3

Answer 2

Answer will be same on positive numbers means(dividing the number by 2).But on negative number it will be not same.