为 vim 增加函数高亮功能

修改 /usr/share/vim/vim72/syntax/c.vim，在最后添加
syn match cFuntions display "[a-zA-Z_][a-zA-Z_0-9]\{-1,}\s\{-0,}(\{1}"ms=s,me=e-1                                                   
hi def link cFuntions Special