How to get any unsigned long

fl2jcj

Given parameter m, 0 <= m <= 23
How to get any m bits of unsigned long, 0 or 1

whwhandywh

For example, take M bits
  unsigned long x = 122;
  x >> (m-1)
  x&&000000000000000000000001

仇恨控制

Rotate right >>, the last one can be 1

仇恨控制

Or define a union
union
{
int i;
IntBit0: 1
IntBit1: 1
...
IntBit31: 1
}
Then you can get it.

fan3786

for (i = 0; i <32; i ++)
  temp = (m >> i)&0x00000001;

1231456

The upstairs is pretty good.

zengji1224

Haha, is n’t it?

unsigned long x;
x&(1 << m)