我的settitle是这样写的，但是创建一个C文件，vim进入后，并没有添加作者信息和头文件，这时为什么呢？
"新建.c,.h,.sh,.java文件，自动插入文件头
autocmd BufNewFile *.cpp,*.[ch],*.sh,*.rb,*.java,*.py exec ":call SetTitle()"
""定义函数SetTitle，自动插入文件头
func SetTitle()
"如果文件类型为.sh文件
if &filetype == 'sh'
call setline(1,"\#!/bin/bash")
call append(line("."), "")
elseif &filetype == 'python'
call setline(1,"#!/usr/bin/env python")
call append(line("."),"# coding=utf-8")
call append(line(".")+1, "")
elseif &filetype == 'ruby'
call setline(1,"#!/usr/bin/env ruby")
call append(line("."),"# encoding: utf-8")
call append(line(".")+1, "")
" elseif &filetype == 'mkd'
" call setline(1,"<head><meta charset=\"UTF-8\"></head>")
else
call setline(1, "/*************************************************************************")
call append(line("."), " > File Name: ".expand("%"))
call append(line(".")+1, " > Author: ")
call append(line(".")+2, " > Mail: ")
call append(line(".")+3, " > Created Time: ".strftime("%c"))
call append(line(".")+4, " ************************************************************************/")
call append(line(".")+5, "")
endif
if expand("%:e") == 'cpp'
call append(line(".")+6, "#include<iostream>")
call append(line(".")+7, "using namespace std;")
call append(line(".")+8, "")
endif
if &filetype == 'c'
call append(line(".")+6, "#include<stdio.h>")
call append(line(".")+7, "")
endif
if expand("%:e") == 'h'
call append(line(".")+6, "#ifndef _".toupper(expand("%:r"))."_H")
call append(line(".")+7, "#define _".toupper(expand("%:r"))."_H")
call append(line(".")+8, "#endif")
endif
if &filetype == 'java'
call append(line(".")+6,"public class ".expand("%:r"))
call append(line(".")+7,"")
endif
"新建文件后，自动定位到文件末尾
endfunc
