diff --git a/vim/ftplugin/cpp.vim b/vim/ftplugin/cpp.vim
new file mode 100644
index 0000000..af6c740
--- /dev/null
+++ b/vim/ftplugin/cpp.vim
@@ -0,0 +1,3 @@
+" max line length column
+set colorcolumn=100
+
diff --git a/vim/install.sh b/vim/install.sh
index 8174059..5bba86b 100755
--- a/vim/install.sh
+++ b/vim/install.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env sh
 
 ln -svrf vimrc ~/.vimrc
+ln -svrf ftplugin ~/.vim/ftplugin
  
diff --git a/vim/vimrc b/vim/vimrc
index 5cc4702..9dde30d 100644
--- a/vim/vimrc
+++ b/vim/vimrc
@@ -33,15 +33,15 @@ call plug#end()
 set tabstop=4
 set shiftwidth=4
 
+" autowrite
+set autowrite
+
 " dark theme
 set background=dark
 
 " line numbers
 set number
 
-" max line length column
-set colorcolumn=100
-
 " always enable status line
 set laststatus=2