A simple and useful VIM configuration with no plugins but only a solarized colorscheme

.vimrc

""""""""""""""""""""""""""""""""""""""""""
""" Pre: Get the solarized colorscheme
"""      mv solarized.vim ~/.vim/colors/
""""""""""""""""""""""""""""""""""""""""""

""" Be iMproved
set nocompatible

syntax enable
" syntax on
" set t_Co=256
""" Xshell bug for solarized colorscheme
set t_Co=8
set background=dark
" let g:solarized_termcolors=256
colorscheme solarized
" colorscheme desert

""" File encodings
set fileencodings=utf-8,gbk,big5

""" C/C++ language indent
set cin
set sw=4
set sm

""" Softtabs
set ts=4
set softtabstop=4

""" Auto indent
set autoindent
set smartindent
set shiftround
set shiftwidth=4

""" Show line number
set nu
""" F2 switch on/off for number 
nnoremap <F2> :set nonumber!<CR>

""" Search
set hlsearch
set matchpairs+=<:>
set incsearch

""" Highlight current line
" au WinLeave * set nocursorline nocursorcolumn
" au WinEnter * set cursorline nocursorcolumn
" set cursorline cursorcolumn

""" Smart completion
set completeopt=longest,menu

""" auto-completion for 
""" quotes, parens, brackets, etc.
:inoremap ( ()<ESC>i
:inoremap { {<CR>}<ESC>O
:inoremap [ []<ESC>i
" :inoremap < <><ESC>i
:inoremap " ""<ESC>i
:inoremap ' ''<ESC>i