c*a
2 楼
你说的是binary? 1是负数, 这种?
t*h
3 楼
en
【在 c*****a 的大作中提到】
: 你说的是binary? 1是负数, 这种?
【在 c*****a 的大作中提到】
: 你说的是binary? 1是负数, 这种?
c*p
4 楼
Two's complement 居多。比如: x86, amd64, sparc都用 Two's complement.
http://en.wikipedia.org/wiki/Two's_complement
The two's-complement system has the advantage that the fundamental
arithmetic operations of addition, subtraction, and multiplication are
identical to those for unsigned binary numbers (as long as the inputs are
represented in the same number of bits and any overflow beyond those bits is
discarded from the result). This property makes the system both simpler to
implement and capable of easily handling higher precision arithmetic. Also,
zero has only a single representation, obviating the subtleties associated
with negative zero, which exists in ones'-complement systems.
【在 t*********h 的大作中提到】
: 一直不太清楚 wiki上列举了N种方式 哪位打牛给说说？
http://en.wikipedia.org/wiki/Two's_complement
The two's-complement system has the advantage that the fundamental
arithmetic operations of addition, subtraction, and multiplication are
identical to those for unsigned binary numbers (as long as the inputs are
represented in the same number of bits and any overflow beyond those bits is
discarded from the result). This property makes the system both simpler to
implement and capable of easily handling higher precision arithmetic. Also,
zero has only a single representation, obviating the subtleties associated
with negative zero, which exists in ones'-complement systems.
【在 t*********h 的大作中提到】
: 一直不太清楚 wiki上列举了N种方式 哪位打牛给说说？
g*e
5 楼
integer use two's comp
floating number use a bit to indicate pos/neg
floating number use a bit to indicate pos/neg
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