main.c

#include <stdio.h>
#include <stdlib.h>

int *initArray(int n) {
  int i;
  int *array;

  array = malloc(n * sizeof(*array));
  /* you should always check malloc success */
  if (array == NULL)
    return NULL;

  for (i = 0 ; i < n ; i++) {
    array[i] = i * 2;
  }

  return array;
}

int main() { /* main should return int */
  int i, n = 5;
  int *array;

  array = initArray(n);
  /* if null is returned,
   * you can't dereference the pointer */
  if (array == NULL)
    return -1;

  printf("Here is the array: ");
  for(i = 0 ; i < n ; i++) {
    printf("%d ", array[i]);
  }
  /* you sould free the malloced pointer or
   * you will have a memory leak */
  free(array);
  printf("\n\n");

  return 0;
}

vimrc

set nocompatible
filetype off
set encoding=utf-8

set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()

Plugin 'gmarik/Vundle.vim'

Plugin 'Shougo/deoplete.nvim'
Plugin 'roxma/nvim-yarp'
Plugin 'roxma/vim-hug-neovim-rpc'

call vundle#end()
filetype plugin indent on


" bug in `longest`
set completeopt=longest,menu,preview

let g:deoplete#enable_at_startup = 1