1 #include <iostream>
2 using namespace std;
3
4 //如果产生继承,子类的对象也可以被父类捕获.因为子类内部包含父类对象
5 class outerror
6 {
7 public:
8 };
9
10 class newerror:public outerror
11 {
12 public:
13 };
14
15 class myclass
16 {
17 private:
18 int *p;
19 int n;
20
21 public:
22 myclass() :p(nullptr), n(0)
23 {
24
25 }
26
27 myclass(int i)
28 {
29 if (i <= 0)
30 {
31 throw newerror();
32 }
33
34 p = new int[i];
35 for (int j = 0; j < i; j++)
36 {
37 p[j] = j;
38 }
39 }
40
41 int operator[](int num)
42 {
43 if (num < 0)
44 {
45 throw newerror();
46 }
47
48 if (num < 0 || num >= n - 1 || p == nullptr)
49 {
50 throw newerror();
51 }
52
53 if (p == nullptr)
54 {
55 throw newerror();
56 }
57 return p[num];
58 }
59 };
60
61 void main()
62 {
63 try
64 {
65 myclass my1(1);
66 cout << my1[4];
67 }
68 catch (outerror e)
69 {
70 cout << "outerror e" << endl;
71 }
72 catch (newerror e)
73 {
74 cout << "newerror e" << endl;
75 }
76
77
78
79 cin.get();
80 }
