继承中的对象模型

class Person
{
private:
    int age;
    char sex;
};

class Student: public Person
{
private:
    int cid;
};

> cl /d1 reportSingleClassLayoutStudent D:\ConsoleApplication1\student.cpp

用于 x86 的 Microsoft (R) C/C++ 优化编译器 19.31.31104 版
版权所有(C) Microsoft Corporation。保留所有权利。

student.cpp

class Student   size(12):
        +---
 0      | +--- (base class Person)
 0      | | age
 4      | | sex
        | | <alignment member> (size=3)
        | +---
 8      | cid
        +---
Microsoft (R) Incremental Linker Version 14.31.31104.0
Copyright (C) Microsoft Corporation.  All rights reserved.