DArray& DArray :: operator+=(const DArray &ra)
{
    int i;
    double *tempEl = new double[brEl+ra.brEl];
    for (i=0; i<brEl; i++)
        tempEl[i] = el[i];

 @h@   for (i=0; i<ra.brEl; i++) // Ovde napisao for (i=0; i<brEl; i++)
        tempEl[i+brEl] = ra.el[i];

    brEl+=ra.brEl;
    delete[] el;
    el = tempEl;
    return *this;
}