【1】程序1
?
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
#include <iostream>
using namespace std;
class Base
{
public:
virtual void print() const = 0;
};
class Test : public Base
{
public:
void print();
};
void Test::print()
{
cout << "Test::print()" << endl;
}
void main()
{
// Base* pChild = new Test(); //compile error!
// pChild->print();
}
|
【2】程序2
?
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
#include <iostream>
using namespace std;
class Base
{
public:
virtual void print() const = 0;
};
class Test : public Base
{
public:
void print();
void print() const;
};
void Test::print()
{
cout << "Test::print()" << endl;
}
void Test::print() const
{
cout << "Test::print() const" << endl;
}
void main()
{
Base* pChild = new Test();
pChild->print();
}
/*
Test::print() const
*/
|
【3】程序3
?
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
#include <iostream>
using namespace std;
class Base
{
public:
virtual void print() const = 0;
};
class Test : public Base
{
public:
void print();
void print() const;
};
void Test::print()
{
cout << "Test::print()" << endl;
}
void Test::print() const
{
cout << "Test::print() const" << endl;
}
void main()
{
Base* pChild = new Test();
pChild->print();
const Test obj;
obj.print();
Test obj1;
obj1.print();
Test* pOwn = new Test();
pOwn->print();
}
/*
Test::print() const
Test::print() const
Test::print()
Test::print()
*/
|
相关文章
猜你喜欢
- ASP.NET本地开发时常见的配置错误及解决方法？ 2025-06-10
- ASP.NET自助建站系统的数据库备份与恢复操作指南 2025-06-10
- 个人网站服务器域名解析设置指南：从购买到绑定全流程 2025-06-10
- 个人网站搭建：如何挑选具有弹性扩展能力的服务器？ 2025-06-10
- 个人服务器网站搭建：如何选择适合自己的建站程序或框架？ 2025-06-10
