我主要參考的資料就是github上面的資料，最好仔細看看，一切以官方文件為準，很多人包括我自己不仔細看官方資料導致安裝外掛失敗

官方原文These instructions (using install.py) are the quickest way to install YouCompleteMe, however they may not work for everyone. If the following instructions don’t work for you, check out the full installation guide.直接用./install.py失敗的小夥伴應該使用完整的編譯方式,這是參照官網上

• 官方提供的補全效果圖
  

下面開始安裝VIM8.0,如果你電腦上有vim,請把它解除安裝乾淨.

1.sudo add-apt-repository ppa:jonathonf/vim
2.sudo apt-get update
3.sudo apt-get install vim

sudo apt-get install g++ cmake python-dev python3-dev gcc

• 安裝好Vundle這個管理外掛(點開連結按照教程即可）

• 注意：如果你在PluginInstall的時候下面提示#install#new#（只大概記得是這樣的），此刻你就需要把etc/vim/vimrc裡面的runtime! debian.vim移到最上面就行即可解決

下面我們安裝YouCompleteMe這個外掛
這是官方推薦的安裝方法

    call vundle#begin()
    ......
    Plugin 'Valloric/YouCompleteMe'
    ......
    call vundle#end()

vimrc配置好了之後開啟vim,執行

 :PluginInstall

如果這種方法無法下載YoucompleteMe,直接到~/.vim/bundle目錄下使用命令列

git clone --recursive https://github.com/Valloric/YouCompleteMe.git

cd YoucompleteMe

git submodule update --init --recursive
 

寫c和c++嘛，自然要標頭檔案的補全啊，官方要求libclang版本要在3.9以上，那麼我們就選擇相對應的把libclang版本下載下來，然後在home目錄下建立ycm_temp資料夾，並把下載的檔案解壓在此資料夾下，並把解壓後的檔名字改為llvm_root_dir，然後再建立一個新的資料夾ycm_build，然後在此資料夾下執行下面的語句

cmake -G "Unix Makefiles" -DPATH_TO_LLVM_ROOT=~/ycm_temp/llvm_root_dir . ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp

cmake --build . --target ycm_core --config Release

下面把這兩句新增到你的vimrc中

let g:ycm_global_ycm_extra_conf='~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm/.ycm_extra_conf.py'(按照你的.ycm_extra_conf.py的路徑來)

let g:ycm_server_python_interpreter='/usr/bin/python'

執行命令

sudo vim ~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm/.ycm_extra_conf.py

在.ycm_extra_conf.py中找到如下所示的位置
新增下面的幾行

'isystem',   (注意每句話後面都有逗號）
'/usr/include',
'isystem',
'/usr/include/c++/5.4.0',（我的c++版本是5.4.0，你們按照自己的情況選擇版本）

如果有用於ros的補全和檢錯,請把這裡配置好的的.ycm_extra_conf.py檔案覆蓋你的.ycm_extra_conf.py

這裡是我的vimrc配置，功能如下所列，都有註釋，可以自己索取所需
1.對C/C++和python的補全，檢錯，以及格式化（類似vs中的格式化程式碼）
2.對括號引號的匹配
3.註釋和反註釋
4.一鍵編譯和執行

runtime! debian.vim

set nocompatible              " be iMproved, required
filetype off                  " required

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'VundleVim/Vundle.vim'
Plugin 'Raimondi/delimitMate'
Plugin 'Valloric/YouCompleteMe'
Plugin 'scrooloose/nerdcommenter'
Plugin 'scrooloose/nerdtree'
Plugin 'jistr/vim-nerdtree-tabs'
Plugin 'Chiel92/vim-autoformat'
Plugin 'skywind3000/asyncrun.vim'
call vundle#end()            " required
filetype plugin indent on    " required

syntax enable 
syntax on
set nu
set hls
set tabstop=4
set shiftwidth=4
set ignorecase
set wrap
set autoindent
set completeopt=longest,menu    "讓Vim的補全選單行為與一般IDE一致(參考VimTip1228)

" Source a global configuration file if available
if filereadable("/home/raysuner/.vimrc.local")
  source /home/raysuner/.vimrc.local
endif

" Starting YouCompleteMe configure 
let mapleader=" "
nnoremap <leader>gl :YcmCompleter GoToDeclaration<CR>
nnoremap <leader>gf :YcmCompleter GoToDefinition<CR>
nnoremap <leader>gg :YcmCompleter GoToDefinitionElseDeclaration<CR>
nnoremap <leader>gi :YcmCompleter GoToInclude<CR>
nnoremap <leader>d :YcmShowDetailedDiagnostic<CR>
nnoremap <F5> :YcmForceCompileAndDiagnostics<CR>

let g:ycm_enable_diagnostic_highlighting = 0
let g:ycm_error_symbol='>>'
let g:ycm_warning_symbol='!!'
let g:ycm_cache_omnifunc=0 " 禁止快取匹配項,每次都重新生成匹配項
let g:ycm_min_num_of_chars_for_completion=1 " 從第1個鍵入字元就開始羅列匹配項
let g:ycm_seed_identifiers_with_syntax=1    " 語法關鍵字補全
let g:ycm_complete_in_strings = 1 " 在字串的中的位置也會被收入補全
let g:ycm_collect_identifiers_from_comments_and_strings = 0 " 註釋和字串中的文字也會被收入補全
let g:ycm_server_python_interpreter='/usr/bin/python2.7'
let g:ycm_global_ycm_extra_conf='~/.ycm_extra_conf.py'
"Ending YouCompleteMe configure

"Starting NeadTree configure
"auto vimenter * NERDTree " 自動開啟NERDTree
" 按F12來進行開關
map <F12> :NERDTreeToggle<CR>
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTreeType") &&b:NERDTreeType == "primary") | q | endif "當只剩下NERDTree而沒有其他檔案時，自動關閉
let g:NERDTreeDirArrowExpandable = '▸'
let g:NERDTreeDirArrowCollapsible = '▾'

" Starting auto-format configure
nnoremap <F3> :Autoformat<CR>
let g:autoformat_verbosemode=1
let g:formatdef_allman = '"astyle --style=allman --pad-oper"'
let g:formatters_cpp = ['allman']
let g:formatters_c = ['allman']
let g:formatter_yapf_style = 'pep8'
"一鍵執行
func! CompileGcc()
    exec "w"
    let compilecmd="!gcc "
    let compileflag="-o %< "
    if search("mpi\.h") != 0
        let compilecmd = "!mpicc "
    endif
    if search("glut\.h") != 0
        let compileflag .= " -lglut -lGLU -lGL "
    endif
    if search("cv\.h") != 0
        let compileflag .= " -lcv -lhighgui -lcvaux "
    endif
    if search("omp\.h") != 0
        let compileflag .= " -fopenmp "
    endif
    if search("math\.h") != 0
        let compileflag .= " -lm "
    endif
    exec compilecmd." % ".compileflag
endfunc

func! CompileGpp()
    exec "w"
    let compilecmd="!g++ "
    let compileflag="-o %< "
    if search("mpi\.h") != 0
        let compilecmd = "!mpic++ "
    endif
    if search("glut\.h") != 0
        let compileflag .= " -lglut -lGLU -lGL "
    endif
    if search("cv\.h") != 0
        let compileflag .= " -lcv -lhighgui -lcvaux "
    endif
    if search("omp\.h") != 0
        let compileflag .= " -fopenmp "
    endif
    if search("math\.h") != 0
        let compileflag .= " -lm "
    endif
    exec compilecmd." % ".compileflag
endfunc

func! RunPython()
        exec "!python %"
endfunc


func! CompileCode()
        exec "w"
        if &filetype == "cpp"
                exec "call CompileGpp()"
        elseif &filetype == "c"
                exec "call CompileGcc()"
        elseif &filetype == "python"
                exec "call RunPython()"
        endif
endfunc

func! RunResult()
        exec "w"
        if search("mpi\.h") != 0
            exec "!mpirun -np 4 ./%<"
        elseif &filetype == "cpp"
            exec "! ./%<"
        elseif &filetype == "c"
            exec "! ./%<"
        elseif &filetype == "python"
            exec "call RunPython()"
        endif
endfunc

map <F9> :call CompileCode()<CR>
imap <F9> <ESC>:call CompileCode()<CR>
vmap <F9> <ESC>:call CompileCode()<CR>
map <F10> :call RunResult()<CR>

再開啟vim試試youcomplete高效的補全和檢錯,如果覺得不錯的話請右上角來波贊~~~~