1 #include <iostream>
2 #include <Windows.h>
3 using namespace std;
4
5 //全局内存管理,统计释放内存,分配内存
6
7 //重载全局的new
8 void *operator new(size_t size)
9 {
10 cout << "g_new call" << endl;
11 void *p = malloc(size);
12 return p;
13 }
14
15 //重载全局的delete
16 void operator delete(void *p)
17 {
18 cout << "g_delete call" << endl;
19 free(p);
20 }
21
22 //重载全局的new[]
23 void *operator new [](size_t size)
24 {
25 cout << size << endl;
26 cout << "g_new call []" << endl;
27 return operator new(size);//每个元素调用一次new
28 }
29
30 //重载全局的delete
31 void operator delete [](void *p)
32 {
33 cout << "g_delete [] call" << endl;
34 free(p);
35 }
36
37 class myclass
38 {
39 public:
40 myclass()
41 {
42 cout << "create call" << endl;
43 }
44 ~myclass()
45 {
46 cout << "delete call" << endl;
47 }
48 //局部重载new
49 static void * operator new(size_t size)
50 {
51 cout << "new call" << endl;
52 return malloc(size);
53 }
54 //局重载delete
55 static void operator delete(void *p)
56 {
57 ::delete p;
58 }
59 };
60
61 void main()
62 {
63 //int *p = new int[3]{ 1,2,3 };
64 //cout << p[1] << endl;
65
66 //myclass *p = new myclass;
67 //delete p;
68
69 //int *pint = new int[10];
70 myclass *p1 = new myclass;
71 //delete p1;
72
73 cin.get();
74 }
