class Base1
{
public:Base1(){this->m_A = 10;}int m_A;
};class Base2
{
public:Base2(){this->m_A = 20;}int m_A;
};
//多继承语法 
class Son : public Base1, public Base2
{
public:int m_C;int m_D;
};
void test01()
{cout << sizeof (Son) << endl;Son s;cout << "Base1中的 m_A = " << s.Base1::m_A << endl;cout << "Base2中的 m_A = " << s.Base2::m_A << endl;
}