关于二进制文件储存格式

matlab中给出以下几种类型，供参考：

machinefmt

 — Order for reading or writing bytes or bits

'n'

 (default)
| 

'b'

 | 

'l'

 | 

's'

 | 

'a'

 | ...

Order for reading or writing bytes or bits in the file, specified as one of the following strings.

'n'  or  'native'	Your system byte ordering (default)
'b'  or  'ieee-be'	Big-endian ordering
'l'  or  'ieee-le'	Little-endian ordering
's'  or  'ieee-be.l64'	Big-endian ordering, 64-bit long data type
'a'  or  'ieee-le.l64'	Little-endian ordering, 64-bit long data type

c++中对于int，和float的数据，可以用下列方法进行位置互换：

((unsigned int *)data)[i] = ntohl(((unsigned int *)data)[i]);

参考：
http://cn.mathworks.com/help/matlab/ref/fread.html#inputarg_machinefmt