16进制浮点数相互转换

# -*- coding: utf8 -*-
import  ctypes
def  h2f(s):
     cp  =  ctypes.pointer(ctypes.c_long(s))
     fp  =  ctypes.cast(cp, ctypes.POINTER(ctypes.c_float))
     return  fp.contents.value
def  f2h(s):
     fp  =  ctypes.pointer(ctypes.c_float(s))
     cp  =  ctypes.cast(fp, ctypes.POINTER(ctypes.c_long))
     return  hex (cp.contents.value)
print (f2h( 3.1415 ))
print (h2f( 0x40490e56 ))


#-------------------

ret = f2h(3.1415)       # ret  = "0x40490e56"
ret2 = h2f(int(ret,16)) # ret2 = 3.14149999619
ret3 = "%.4f"%ret2      # ret3 = "3.1415"
ret4 = float(ret3)      # ret4 = 3.1415

版权声明：本文为zjl50原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接和本声明。