#include <iostream>using std::cout;class A{private: int m_iVal;};class B:public A{ double m_iVal; //试图修改基类中的m_iVal从int变为float是不可能的,B中有两个m_iVal ,关于更多内容后面介绍!};int main(){ A a; B b; cout << sizeof(a) << " " << sizeof(b) << endl; return 0;}