compile_or_run_onvim.vim

" C
    autocmd FileType c nnoremap <buffer> <F5> :call <SID>execGcc()<CR>
    autocmd FileType c nnoremap <buffer> <F6> :call <SID>runC()<CR>
    autocmd FileType c nnoremap <buffer> <F7> :call <SID>runCToFile()<CR>
    function! s:execGcc()
        :w
        exe ":!gcc % -lm -O2 -o %.out"
    endfunction

    function! s:runC()
        exe ':!' . expand('%') . '.out'
    endfunction
    
    function! s:runCToFile()
        exe ":!./%.out > %.data"
    endfunction