如果用父類指針指向子類對象，能否訪問子類多出來的數據成員或者成員函數？（除了虛函數）

例如

class?shape
{
public:
????shape();
????~shape();
};

class?circle:public?shape
{
public:
????circle();
????~circle();
????int?radius;
};

shape?*p?=?new?circle;
cout?<<?p->radius?<<?endl;????????//能否通過此語句訪問circle的radius