1 #include<iostream>
2
3 #include<cstdlib>
4 using namespace std;
5 ////非安全退出，结束进程,
6 //C++ 必须释放对象，最后结束，安全退出
7
8 class pstr
9 {
10 int *p;
11 public:
12 pstr()
13 {
14 cout << "构造" << endl;
15 p = new int[1024 * 1024];
16 }
17 ~pstr()
18 {
19 cout << "析构" << endl;
20
21 delete[] p;
22
23 }
24 };
25 void run3(int i)
26 {
27 if (i == 0)
28 {
29 //throw 1;
30 exit(0); //非安全退出，结束进程
31 //安全退出，释放对象内存，再结束进程
32 }
33 else
34 {
35 cout << "run3" << endl;
36 }
37
38 }
39 void run2(int i)
40 {
41 pstr p2;
42 run3(0);
43 }
44
45 void run1(int i)
46 {
47 pstr p1;
48 run2(i);
49 }
50
51 void main()
52 {
53 try
54 {
55 run1(0);
56 }
57 catch (int i)
58 {
59 cout << i << "error";
60
61 }
62
63 std::cin.get();
64 exit(0);
65 }
