16进制和浮点数的互相转换，先转成二进制在进行转换的方法-Hex and float in mutual conversion, first convert the binary during the conversion

将Float转换成4个16进制的字节格式，或者将4个字节的16进制格式转换成Float值。(Convert the Float into 4 16 byte byte formats, or convert the 4 byte 16 format to the Float value.)