-1.00...000b ~ +011...111b,
(31個0) (31個1)
即: -(2^31)d ~ +(2^31 -1)d
.
32位字長補碼表示的有符號定點小數真值範圍:
-1.00...000b ~ +0.11...111b
即:-1d ~ +(2^31-1)d/(2^31)d