title: SCIP: Solving QPs via interactive shell
body: <p>Is it possible to solver QPs via precompiled binary files (interactive shell)? </p>
  
  <p>I tried a couple of samples and none worked. Am I missing anything? </p>
  
  <pre><code>Minimize
  obj: a + b + [ a^2 + 4 a * b + 7 b^2 ]
  Subject To
  c1: a + b &gt;= 10
  End
  </code></pre>
  
  <p>In this one I get the following msg: </p>
  
  <pre><code>[src/scip/reader_lp.c:147] ERROR: Syntax error in line 3 ('Subject'): expected '/2' or '/ 2' after end of quadratic part in objective. 
    input: Subject To
                 ^
  [src/scip/reader_lp.c:3362] ERROR: Error &lt;-2&gt; in function cal
  </code></pre>
  
  <p>Another example: </p>
  
  <pre><code>Maximize
   obj: x1 + 2 x2 + 3 x3 + x4
  Subject To
   c1: - x1 * x3 + x2 + x3 + 10 x4 &lt;= 20
   c2: x1 - 3 x2 + x3 &lt;= 30
   c3: x2 - 3.5 x4 = 0
  Bounds
   0 &lt;= x1 &lt;= 40
   2 &lt;= x4 &lt;= 3
  General
   x4
  End
  </code></pre>
  
  <p>and here is the output msg here: </p>
  
  <pre><code>[src/scip/reader_lp.c:147] ERROR: Syntax error in line 4 ('x3'): expected sign ('+' or '-') or sense ('&lt;' or '&gt;'). 
    input:  c1: - x1  x3 + x2 + x3 + 10 x4 &lt;= 20
                         ^
  [src/scip/reader_lp.c:3362] ERROR: Error &lt;-2&gt; in function call
  error reading file &lt;sample.lp&gt;
  </code></pre>