title: Invalid operands to binary expression ('double' and 'double') objective-c issue
body: <p>Invalid operands to binary expression ('double' and 'double') objective-c issue</p>
  
  <pre><code>-(double)performOperationWith:(double *)operand1 
                           And:(double *)operand2 {
  
      double result = 0.0;
  
      result = operand1 + operand2;
  
      return result;
  }
  </code></pre>