proj10_02.cpp

来自「C++程序设计教程的全部源代码 包含与教程同步的PPT 方便学习」· C++ 代码 · 共 29 行

#include <iostream.h>
class A
{
public:
    A(){a = 1;}		// 以class A 建立的对象初值都设a=1
    int a;
};
class B : public A
{
public:
    B(){b = 2;}		// 以class B 建立的对象初值都设b=2
    int b;
};
void main()
{
	A objA;
	B objB;
	cout << "sizeof(objA) = " << sizeof(objA) << "\n";
	cout << "sizeof(objB) = " << sizeof(objB) << "\n";
	/* 观察objA与objB对象,成员地址 */
	cout << &objA << " " << &objA.a << "\n";
	cout << &objB << " " << &objB.a << " " << &objB.b << "\n";
	cout << objA.a << "\n";
	cout << objB.a << " " << objB.b << "\n";
	
}