IEEE754 浮点数

5.75：101.1100000000 S=0 E=10000001 M=01110000000000000000000
161.875：10100001.11100000 S=0 E=10000110 M=01000011110000000000000
-0.0234375：-0.0000011000 S=1 E=01111001 M=10000000000000000000000