Usage of "<& lt":
The format is: a; =0。
Function: shift the integer a to the left by m bits according to the binary bit, and after the high bit is shifted out, the low bit is supplemented by 0.
"> > usage:
The format is: a>& gtm, a and m m > are integer expressions, and m > is required; =0。
Function: according to the binary bit, shift the integer A to the right by m bits, and make up 0 for the high bit after the low bit shift.