void (T_Database::*type_a)()=0;
注意一下类方法的函数指针的定义方法。

点击(此处)折叠或打开

头文件
#include<iostream>
using namespace std;
class T_Database
{
public:
virtual void __Check() =0;
virtual void __Rred() =0;
virtual void __All() =0;
};
class T_Oracle:public T_Database
{
public:
virtual void __Check(){
cout<<"Check ORA db"<<endl;
}
virtual void __Rred(){
cout<<"Read ORA db"<<endl;
}
virtual void __All(){
cout<<"Read and Check ORA db"<<endl;
}
};
class T_Mysql:public T_Database
{
public:
virtual void __Check(){
cout<<"Check MYSQL db"<<endl;
}
virtual void __Rred(){
cout<<"Read MYSQL db"<<endl;
}
virtual void __All(){
cout<<"Read and Check MYSQL db"<<endl;
}
};
点击(此处)折叠或打开
1. 主调函数
2. #include<iostream>
3. using namespace std;
4. #include"Class.h"
6. int main(void)
7. {
8. T_Database* db_a;
9. void (T_Database::*type_a)()=0;
10. int dbcho,typecho;
11. bool uinput=false;
13. while(uinput==false)
14. {
15. cout<<"Input your db type[0]quit[1]Oracle[2]Mysql"<<endl;
16. cin>>dbcho;
17. switch(dbcho)
18. {
19. case 0:
20. {
21. uinput = true;
22. return 1;
23. }
24. case 1:
25. {
26. db_a = new T_Oracle;
27. break;
28. }
29. case 2:
30. {
31. db_a = new T_Mysql;
32. break;
33. }
34. default:
35. {
36. cout<<"Please input 0-2"<<endl;
37. break;
38. }
39. }
40. if(dbcho!=1&&dbcho!=2)
41. {
42. continue;
43. }
45. cout<<"Input what do[0]quit[1]Check[2]Rred[3]All"<<endl;
46. cin>>typecho;
47. switch(typecho)
48. {
49. case 0:
50. {
51. cout<<"please input int"<<endl;
52. uinput = true;
53. return 2;
54. }
55. case 1:
56. {
57. type_a = &T_Database::__Check;break;
58. }
59. case 2:
60. {
61. type_a = &T_Database::__Rred;break;
62. }
63. case 3:
64. {
65. type_a=&T_Database::__All;break;
66. }
67. default:
68. {
69. cout<<"Please input 0-3,will exit"<<endl;
70. return 3;
71. }
72. }
73. (db_a->*type_a)();
74. }
75. return 0;
76. }

ITPub博客

关于C++类方法函数指针的定义和使用方法

最新文章