the problem of th test.lua

[caixialiu-bjut]

Hi, I am interested in your paper. I have a problem when running the code, as follows:
hp@hp-HP-Z840-Workstation:~/cnncomplete-master/torch$ th

______ __ | Torch7 / Debian
/_ / ________/ / | Scientific computing for Lua.
/ / / _ / __/ / _ \ | Type ? for help
/_/ _// _//// | https://github.com/torch
| http://torch.ch

th> os.exit()
hp@hp-HP-Z840-Workstation:~/cnncomplete-master/torch$ th test.lua
/usr/bin/luajit: /usr/share/lua/5.1/trepl/init.lua:389: module 'nn' not found:
no field package.preload['nn']
no file './nn.lua'
no file '/usr/share/luajit-2.1.0-beta3/nn.lua'
no file '/usr/local/share/lua/5.1/nn.lua'
no file '/usr/local/share/lua/5.1/nn/init.lua'
no file '/usr/share/lua/5.1/nn.lua'
no file '/usr/share/lua/5.1/nn/init.lua'
no file './nn.so'
no file '/usr/local/lib/lua/5.1/nn.so'
no file '/usr/lib/x86_64-linux-gnu/lua/5.1/nn.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
[C]: in function 'error'
/usr/share/lua/5.1/trepl/init.lua:389: in function 'require'
test.lua:3: in main chunk
[C]: in function 'dofile'
/usr/lib/torch-trepl/th:149: in main chunk
[C]: at 0x562346d621d0