title: put string and character in ofstream
body: <p>I want to put string and character together in <code>ofstream()</code> but I get error I want to create files in different names but in same path for example like this <code>E://string.txt</code> but string is variable
  can you help me?</p>
  
  <pre><code>#include &lt;iostream&gt;
  #include &lt;ofstream&gt;
  using namespace std;
  int main()
  {
    string filename;
    ofstream note("E://"filename".txt",ios::app);
  }
  </code></pre>
  
  <p>Can you get my point?
  I know my code is wrong but help me fix it!</p>