JasonRight

typedef boost::shared_ptr<class Shape> ShapeSharedPtr;

ShapeSharedPtr shapeSP = ShapeSharedPtr(new Shape());

typedef boost::shared_ptr<std::vector<ShapeSharedPtr>> ShapeListSharedPtr;

typedef std::vector<boost::shared_ptr<class Shape>> ShapeList;

ShapeListSharedPtr shapeListSP = ShapeListSharedPtr(new ShapeList);

Shape* pShape = shapeSP.get();

Shape* shapePointer = new Shape();
ShapeListSharedPtr shapePointerSP = ShapeListSharedPtr(shapePointer);

shapeSP.reset();

typedef boost::shared_ptr<class Triangle> TriangleSharedPtr;

ShapeSharedPtr triangleShapeSP = ShapeSharedPtr(new Triangle());

TriangleSharedPtr triangleSP = boost::dynamic_pointer_cast<Traingle>(
triangleShapeSP);

if(trangleSP.get())
{
//为子类对象
}

String strNum = "3.1415926";
try
{
    int nNum = boost::lexical_cast<int>(strNum);
}catch(boost::bad_lexical_cast e)
{
//转换失败
}