title: For a given integer n, find the number following n that is a multiple of 10
body: <p>For a given integer, <em>n</em>, find the number following <em>n</em> that is a multiple of 10.</p>
  <p>I wrote code that seems to be correct, but the site reviewer writes that it is only 90% correct. What could be the problem?</p>
  <pre class="lang-cpp prettyprint-override"><code>#include &lt;iostream&gt;
  using namespace std;
      
  int main()
  {
      int n;
      cin &gt;&gt; n;
      if (n == 0) n = n + 10;
      while (n % 10 != 0) n++;
      cout &lt;&lt; n;
  }
  </code></pre>