1. compile the file [rotate.cpp]
2. execute the file [rotate.exe]
3. choose (1) for encoder or (2) for decoder

input file: in.raw
output files: default k1.raw, k2.raw, ...
result: default k.raw

ps: In the executable file, only the first sub-region can be obtained,
    and user can obtain other sub-regions by modifying the source code
    [rotate.cpp].