title: Very basic C++ program issue - Invalid operands to binary expression
body: <p>I just started teaching myself C++ on the Mac, and I have run into some issues. </p>
  
  <p>I have written some code that allows the user to enter a number and when they hit enter, the number will be returned to the user. </p>
  
  <p>Xcode will absolutely not have it though. Every time I try to run my code, it says that there is an issue with the <code>cin&gt;&gt; thisisanumber;</code> code. </p>
  
  <p>The error comes up and says </p>
  
  <p><code>Invalid operands to binary expression.</code> <strong>Error is on line 10.</strong></p>
  
  <p>What am I doing wrong?</p>
  
  <pre><code>#include &lt;iostream&gt;
  
  using namespace std;
  
  int main()
  {
     int thisisanumber();
  
     cout &lt;&lt; "Please enter a number: ";
     cin  &gt;&gt; thisisanumber;
     cin.ignore();
     cout &lt;&lt; "You entered"&lt;&lt; thisisanumber &lt;&lt;"\n";
     cin.get();
  }
  </code></pre>