How to use right shift operator with negative value in c?

Answer 1

Nothing special: value >> number.

Example:

/* shift.c */

#include <stdio.h>

int main (void)

{

long n;

int i;

n= -98765;

for (i=0; i<20; ++i) {

printf ("%2d: %6ld %lx\n", i, n>>i, n>>i);

}

return 0;

}

output:

0: -98765 fffe7e33

1: -49383 ffff3f19

2: -24692 ffff9f8c

3: -12346 ffffcfc6

4: -6173 ffffe7e3

5: -3087 fffff3f1

6: -1544 fffff9f8

7: -772 fffffcfc

8: -386 fffffe7e

9: -193 ffffff3f

10: -97 ffffff9f

11: -49 ffffffcf

12: -25 ffffffe7

13: -13 fffffff3

14: -7 fffffff9

15: -4 fffffffc

16: -2 fffffffe

17: -1 ffffffff

18: -1 ffffffff

19: -1 ffffffff