对于程序员来说，新建一个cpp文件是再频繁不过的事情了。 为了方便，我们习惯在桌面右键新建文件，而不是新建一个文本文档，然后修改后缀名。 百度谷歌查询了一下，终于知道如何添加注册表。 手痒，抽出时间用cpp写了一个程序，方便以后操作。 客户需求是永远无法满足的，经同学测试，陆续写了三个版本。 接下来直接贴代码~ 

第一个版本，只能添加c、cpp、java三种后缀。 

/*
 * Author: Haipz
 * School: HDU
 * File Name: registry1.0.cpp
 */
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <climits>
#include <cfloat>
#include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
using namespace std;

char s[1024], buffer[128], result[1024*4];

void work_1() {
	system("reg add \"HKEY_CLASSES_ROOT\\.c\\ShellNew\" /v \"NullFile\" /t REG_SZ");
}

void work_2() {
	system("reg add \"HKEY_CLASSES_ROOT\\.cpp\\ShellNew\" /v \"NullFile\" /t REG_SZ");
}

void work_3() {
	system("reg add \"HKEY_CLASSES_ROOT\\.java\\ShellNew\" /v \"NullFile\" /t REG_SZ");
}

int main() {
	printf("Add registry for C, C++ and Java\n");
	printf("Author: Haipz\nSchool: HDU\n");
	printf("1 for C;\n2 for C++;\n3 for Java.\n");
	printf("Example: 12 to add C and C++.\n");
	printf("Please make choice(s): ");
	gets(s);
	for (int i = 0; s[i] != '\0'; ++i) {
		printf("Working...\n");
		if (s[i] == '1') work_1();
		else if (s[i] == '2') work_2();
		else if (s[i] == '3') work_3();
		else printf("%c is a wrong enter!\n", s[i]);
	}
	system("pause");
	return 0;
}
第二个版本，精简了代码，支持添加用户输入的后缀。 


/*
 * Author: Haipz
 * School: HDU
 * File Name: registry2.0.cpp
 */
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <climits>
#include <cfloat>
#include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
using namespace std;

char a[1024];
char b[1024] = "reg add \"HKEY_CLASSES_ROOT\\.";
char c[1024] = "\\ShellNew\" /v \"NullFile\" /t REG_SZ";

void work(char* a) {
	strcat(b, a);
	strcat(b, c);
	system(b);
}

int main() {
	printf("Function: Add registry to build a new file simply!\n");
	printf("Author: Haipz\nSchool: HDU\n");
	printf("Example: Enter c to add C and enter cpp to add C++.\n");
	printf("Your opion: ");
	gets(a);
	work(a);
	system("pause");
	return 0;
}
第三个版本，支持多次添加，并允许删除已添加的注册表。 
 

/*
 * Author: Haipz
 * School: HDU
 * File Name: registry2.0.cpp
 */
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <climits>
#include <cfloat>
#include <iostream>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
using namespace std;

char key[1024];
char a[1024];

void add(char* t) {
	char b[1024] = "reg add \"HKEY_CLASSES_ROOT\\.";
	char c[1024] = "\\ShellNew\" /v \"NullFile\" /t REG_SZ";
	strcat(b, t);
	strcat(b, c);
	system(b);
}

void del(char* t) {
	char d[1024] = "reg delete \"HKEY_CLASSES_ROOT\\.";
	char e[1024] = "\\ShellNew\" /f";
	strcat(d, t);
	strcat(d, e);
	system(d);
}

int main() {
	printf("Function: Build a new file simply!\n");
	printf("Author: Haipz\nSchool: HDU\n");
	printf("Example: Enter \"c\" to add C and enter \"cpp\" to add C++;\n");
	printf("         Enter \"-c\" to delete C.\n");
	do {
		printf("Your opion: ");
		gets(a);
		if (a[0] == '-') del(a + 1);
		else add(a);
		printf("Enter \"r\" to run again or any other key to quit: ");
		gets(key);
	} while (key[0] == 'r');
	return 0;
}


打包下载：Regedity
转载保留版权：http://haipz.com/blog/i/29 - 海胖博客