第二个版本，精简了代码，支持添加用户输入的后缀。
1 /*
2  * Author: Haipz
3  * School: HDU
4  * File Name: registry2.0.cpp
5  */
6 #include <cstdio>
7 #include <cmath>
8 #include <ctime>
9 #include <cctype>
10 #include <cstring>
11 #include <cstdlib>
12 #include <climits>
13 #include <cfloat>
14 #include <iostream>
15 #include <vector>
16 #include <stack>
17 #include <queue>
18 #include <set>
19 #include <map>
20 #include <algorithm>
21 using namespace std;
22
23 char a[1024];
24 char b[1024] = "reg add "HKEY_CLASSES_ROOT\.";
25 char c[1024] = "\ShellNew" /v "NullFile" /t REG_SZ";
26
27 void work(char* a) {
28     strcat(b， a);
29     strcat(b， c);
30     system(b);
31 }
32
33 int main() {
34     printf("Function: Add registry to build a new file simply! ");
35     printf("Author: Haipz School: HDU ");
36     printf("Example: Enter c to add C and enter cpp to add C++. ");
37     printf("Your opion: ");
38     gets(a);
39     work(a);
40     system("pause");
41     return 0;
42 }
　　第三个版本，支持多次添加，并允许删除已添加的注册表。
1 /*
2  * Author: Haipz
3  * School: HDU
4  * File Name: registry2.0.cpp
5  */
6 #include <cstdio>
7 #include <cmath>
8 #include <ctime>
9 #include <cctype>
10 #include <cstring>
11 #include <cstdlib>
12 #include <climits>
13 #include <cfloat>
14 #include <iostream>
15 #include <vector>
16 #include <stack>
17 #include <queue>
18 #include <set>
19 #include <map>
20 #include <algorithm>
21 using namespace std;
22
23 char key[1024];
24 char a[1024];
25
26 void add(char* t) {
27     char b[1024] = "reg add "HKEY_CLASSES_ROOT\.";
28     char c[1024] = "\ShellNew" /v "NullFile" /t REG_SZ";
29     strcat(b， t);
30     strcat(b， c);
31     system(b);
32 }
33
34 void del(char* t) {
35     char d[1024] = "reg delete "HKEY_CLASSES_ROOT\.";
36     char e[1024] = "\ShellNew" /f";
37     strcat(d， t);
38     strcat(d， e);
39     system(d);
40 }
41
42 int main() {
43     printf("Function: Build a new file simply! ");
44     printf("Author: Haipz School: HDU ");
45     printf("Example: Enter "c" to add C and enter "cpp" to add C++; ");
46     printf("         Enter "-c" to delete C. ");
47     do {
48         printf("Your opion: ");
49         gets(a);
50         if (a[0] == '-') del(a + 1);
51         else add(a);
52         printf("Enter "r" to run again or any other key to quit: ");
53         gets(key);
54     } while (key[0] == 'r');
55     return 0;
56 }
　　打包下载地址：
　　http://files.cnblogs.com/haipzm/Regedity.zip
　　注意，如果系统提示缺少某dll文件，请到网上下载，并复制到C:WindowsSystem32目录下。