title: error: request for member "machine" in something not a structure or union
body: <p>When I'm trying to compile below program I'm getting error as request for member "machine" in something not a structure or union</p>
  
  <pre><code>struct machine
  {
      int a;
      int b;
      int c;
  };
  struct config
  {
      struct machine *machine;
      int n;
  };
  int main()
  {
      struct config *conf;
      struct machine *mach;
  
      mach-&gt;a=1;
      mach-&gt;b=2;
      mach-&gt;c=3;
  
      conf.machine=mach; /* error in this line */  
  
  return 0;
  }
  </code></pre>
  
  <p>Can anyone help me in fixing this bug.. Thanks in advance!!!</p>