理解继承中的构造器和析构器

 1 #include <iostream>
 2 #include <string>
 3
 4 using namespace std;
 5
 6 class FatherClass
 7 {
 8 public:
 9     FatherClass();
10     ~FatherClass();
11 };
12
13 FatherClass::FatherClass()
14 {
15     cout << "this is FatherClass constructor"<<endl;
16 }
17
18 FatherClass::~FatherClass()
19 {
20     cout << "this is FatherClass finalizer"<<endl;
21 }
22
23 class ChildClass:public FatherClass
24 {
25 public:
26     ChildClass();
27     ~ChildClass();
28 };
29
30 ChildClass::ChildClass()
31 {
32     cout << "this is ChlidClass constructor"<<endl;
33 }
34
35 ChildClass::~ChildClass()
36 {
37     cout << "this is ChildClass finalizer"<<endl;
38 }
39
40 int main()
41 {
42     ChildClass a;
43     cout << "finished"<<endl;
44     return 0;
45 }

执行结果：