浮点数IEEE754
浮点数可理解成二进制中的科学计数法
5.75:01.0111*2^2
161.875:01.100001111*2^7
-0.0234375:10.0000011(?)
举例:(来源网络)https://www.cnblogs.com/oxspirt/p/7234024.html
http://www.weitz.de/ieee/
5.75:0.10000001.01110000000000000000000
161.875:0.10000110.01000011110000000000000