写个程序来验证以下问题

2010-08-30 01:07:01 189 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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写个程序来验证以下问题：
子类的destructor被调用时，是在执行子类的destructor之前调用，还是执行之后调用？

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切换为时间正序

peculiarhu 2010-08-30

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楼主说的难道是这个，顶3楼的，看看深度探索C++对象模型
1 #include <iostream>
2 using namespace std;
3
4 class Base
5 {
6 public:
7 Base()
8 {
9 cout << "base constructor" << endl;
10 }
11 virtual ~Base()
12 {
13 cout << "base destructor" << endl;
14 }
15 };
16
17 class Derived:public Base
18 {
19 public:
20 Derived()
21 {
22 cout << "derived constructor" << endl;
23 }
24 ~Derived()
25 {
26 cout << "derived destructor" << endl;
27 }
28 };
29
30 int main()
31 {
32 Base *test = new Derived;
33 delete test;
34 return 0;
35 }
"destructor.cpp" 35L, 431C written
peculiar@ubuntu:~/cpptest/basic$ g++ -g -o destructor destructor.cpp
peculiar@ubuntu:~/cpptest/basic$ ./destructor
base constructor
derived constructor
derived destructor
base destructor

peculiarhu 2010-08-30

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peculiarhu 2010-08-30

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楼主要的难道是这个？顶3楼的，看看深度探索C++对象模型
1 #include <iostream>
2 using namespace std;
3
4 class Base
5 {
6 public:
7 Base()
8 {
9 cout << "base constructor" << endl;
10 }
11 virtual ~Base()
12 {
13 cout << "base destructor" << endl;
14 }
15 };
16
17 class Derived:public Base
18 {
19 public:
20 Derived()
21 {
22 cout << "derived constructor" << endl;
23 }
24 ~Derived()
25 {
26 cout << "derived destructor" << endl;
27 }
28 };
29
30 int main()
31 {
32 Base *test = new Derived;
33 delete test;
34 return 0;
35 }
"destructor.cpp" 35L, 431C written
peculiar@ubuntu:~/cpptest/basic$ g++ -g -o destructor destructor.cpp
peculiar@ubuntu:~/cpptest/basic$ ./destructor
base constructor
derived constructor
derived destructor
base destructor

springSuperboy 2010-08-30

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[Quote]
头文件中：
#include<iostream>
using namingspace std;
class Person
{
public:
Person(){ cout<<"Person::Person() constructor!\n";}
~Person(){cout<<"Person::~Person() destructor!\n";}
};
class Student : public Person
{
public:
Student(){cout<<"Student::Student() constructor!\n";}
~Student(){cout<<"Student::~Student() destructor!\n";}
};
main函数：
Student obj；

[/Quote]
运行就可以了

springSuperboy 2010-08-30

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<quote>
头文件中：
#include<iostream>
using namingspace std;
class Person
{
public:
Person(){ cout<<"Person::Person() constructor!\n";}
~Person(){cout<<"Person::~Person() destructor!\n";}
};
class Student : public Person
{
public:
Student(){cout<<"Student::Student() constructor!\n";}
~Student(){cout<<"Student::~Student() destructor!\n";}
};
main函数：
Student obj；
</quote>

ForestDB 2010-08-30

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LZ还是去看Inside C++ Object Model？

MichaelBomb 2010-08-30

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sorry,miss two ; after class A,B

MichaelBomb 2010-08-30

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难道是这个意思？



#include <iostream>

using std::cout;

using std::endl;

class A

{

public:

    ~A(){cout<<"Base class A destructor"<<endl;}

}

class B:public A

{

public:

    ~B(){cout<<"Child B destructor"<<endl;}

}

int main()

{

    B b;

    return 0;

}

写个程序来验证以下问题

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