1 #include <iostream>
2 using namespace std;
3
4 //构造的时候,从父类到子类构造
5 //子类构造先调用父类构造
6 class myclass
7 {
8 public:
9 int x;
10 int y;
11
12 public:
13 myclass(int a,int b):x(a),y(b)
14 {
15 cout << "myclass" << endl;
16 }
17 ~myclass()
18 {
19
20 }
21 };
22
23 class newmyclass :public myclass
24 {
25 public:
26 int z;
27 public:
28 newmyclass(int a, int b,int c) :myclass(a, b),z(c)
29 {
30 cout << "newmyclass" << endl;
31 }
32
33 };
34
35 class newnewclass :public newmyclass
36 {
37 public:
38 int l;
39 public:
40 newnewclass(int a, int b, int c, int d) :newmyclass(a,b,c), l(d)
41 {
42 cout << "newnewclass" << endl;
43 }
44 };
45
46 void main()
47 {
48 newnewclass my(1,2,3,4);
49 cin.get();
50 }
