Can't get qScript to work

Hi,

I have two arrays of QVector<double>, and I would like a script to calculate two variables mVar and nVar, I can't seem to get it to work.

Here is my C++ codes and the script, can anyone help please? Thanks!

Code:

#include <QScriptEngine>
#include <QCoreApplication>
#include <QFile>
#include <QDebug>
 
static QScriptValue toQScriptValue( const QVector<double>& val, QScriptEngine& engine )
{
  QScriptValue result = engine.newArray( val.size() );
  for ( int idx = 0; idx < val.size(); idx++ ) {
    result.setProperty( idx, val[ idx ] );
  }
  return result;
}
 
int main( int argc, char** argv )
{
  QCoreApplication app( argc, argv );
 
  // two arrays gr, rhob
  int size = 10;
  QVector<double> gr( size ), rhob( size );
  for ( int idx = 0; idx < size; idx++ ) {
    gr[ idx ] = 200. * qrand() / RAND_MAX;
    rhob[ idx ] = 2.2 + 0.6 * qrand() / RAND_MAX;
  } 
 
  QScriptEngine engine;
  engine.globalObject().setProperty( "gr", toQScriptValue( gr, engine ) );
  engine.globalObject().setProperty( "rhob", toQScriptValue( rhob, engine ) );
 
  // script to calculate mVar, nVar
  QString scriptFileName( "func.js" );
  QFile scriptFile( scriptFileName );
  scriptFile.open( QIODevice::ReadOnly );
  QString contents = scriptFile.readAll();
  scriptFile.close();
 
  // not working
  QScriptValue func = engine.evaluate( contents, scriptFileName );
  qDebug() << func.toString();
  qDebug() << func.property( "mVar" ).toString();
  qDebug() << func.property( "nVar" ).toString();
 
  // not working either
  QScriptValue result = func.call();
  qDebug() << result.toString();
  qDebug() << result.property( "mVar" ).toString();
  qDebug() << result.property( "nVar" ).toString();
 
}

and following is func.js script

Code:

var mVar;
var nVar;
 
function calcMN()
{
  mVar = new Array( gr.length );
  nVar = new Array( gr.length );
  for ( var idx = 0; idx < gr.length; idx++ ) {
    mVar[ idx ] = Math.pow( gr[ idx ], 2 ) / Math.pow( rhob[ idx ], 4 );
    nVar[ idx ] = gr[ idx ] / rhob[ idx ];
    print( "m = ", mVar[ idx ], ", n = ", nVar[ idx ] );
  }
}