how to present function name at statusline on vim

When I open any .c file, I hope that function name will be present at statusline according to current cursor position.

set statusline=%<%F%h%m%r%h%w%y\ %{strftime(\"%Y/%m/%d-%H:%M\")}%=\ col:%c%V\ ascii:%b\ pos:%o\ lin:%l\,%L\ %P

plz let me know how to present function name at statusline on vim

Solution

I found the solution.

first, it need to ctag. and then below vim.tgz extract at home directory.

thanks Bryan