[C语言]删除用户自定义后缀名的所有文件

环境：win7

IDE:DEV-C++

编译器：GCC

编译结果：Success

运行结果：Success

使用说明：

1.输入需要查询的目录，比如e:

2.输入需要删除的后缀名：比如:txt

注意：本程序使用Remove删除文件，所以删除的文件不会进回收站。

程序：http://files.cnblogs.com/IAmBetter/DeleteEverything.rar

源码：

#include <stdio.h>
#include <direct.h> //_getcwd(), _chdir()
#include <stdlib.h> //_MAX_PATH, system()
#include <io.h>     //_finddata_t, _findfirst(), _findnext(), _findclose()
#include <string.h>
#include <windows.h>

//删除总数
int count = 0;

//获取当前路径
void GetCurrentPath(void)
{
 	  char buf[80];
	  getcwd(buf, sizeof(buf));
	  printf("current working directory : %s\n", buf);
}

//获取后缀名
char *substr(const char*str)
{
    char *ptr, c = '.';
    static char stbuf[256];
    ptr = strrchr(str, c); //最后一个出现c的位置
    if(ptr == NULL){
       return stbuf;
	   }
    int pos = ptr-str;//用指针相减 求得索引
    unsigned start = pos + 1;
    unsigned end = strlen(str);
    unsigned n = end - start;
    strncpy(stbuf, str + start, n);
    stbuf[n] = 0; //字串最后加上0
    return stbuf;
}

//递归查询文件并且删除
void findAllFile(char *pFilePath,char *extName)
{
	WIN32_FIND_DATA FindFileData;
	DWORD dwError;
	HANDLE hFind = INVALID_HANDLE_VALUE;
	char DirSpec[MAX_PATH+1];
	strncpy(DirSpec, pFilePath, strlen(pFilePath) + 1);
	SetCurrentDirectory(pFilePath);
	strncat(DirSpec, "\\*", 3);
	hFind = FindFirstFile(DirSpec, &FindFileData);
	if (hFind == INVALID_HANDLE_VALUE){
       printf ("FileName:%s    Invalid file handle. Error is %u\n", pFilePath,GetLastError());
   	   return ;
	}
	else{
		if (FindFileData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY ){
        printf("FileName:%s\n", FindFileData.cFileName);
		}
		else if(FindFileData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY&& strcmp(FindFileData.cFileName, ".") != 0&& strcmp(FindFileData.cFileName, "..") != 0){
        char Dir[MAX_PATH + 1];
        strcpy(Dir, pFilePath);
        strncat(Dir, "\\", 2);
        strcat(Dir, FindFileData.cFileName);
        findAllFile(Dir,extName);
		}
		while (FindNextFile(hFind, &FindFileData) != 0){
			if (FindFileData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY){
			     _chdir( pFilePath );
				 char *extname2 = substr(FindFileData.cFileName);
  	  			 if(strcmp(extname2,extName) ==0){
			         printf ("\nFileName:%s ", FindFileData.cFileName);
					 int result = remove(FindFileData.cFileName);
				  	 if(result == 0)
				  	 {
 		   			 		   printf("Delete Result:%d",result);
 		   			 		   count++;
							   }
                      else{
					  	  perror("remove");
						  }
					 }
			}
			else if(FindFileData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY && strcmp(FindFileData.cFileName, ".") != 0&& strcmp(FindFileData.cFileName, "..") != 0){
				char Dir[MAX_PATH + 1];
				strcpy(Dir, pFilePath);
				strncat(Dir, "\\", 2);
				strcat(Dir, FindFileData.cFileName);
				findAllFile(Dir,extName);
			}
		}
		dwError = GetLastError();
		FindClose(hFind);
		if (dwError != ERROR_NO_MORE_FILES) {
			printf ("FindNextFile error. Error is %u\n", dwError);
			return;
		}
	}
}  

//开始显示部分
void Show(char str[])
{
 	 int i,len;
	 len = strlen(str);
 	 for(i=0;i<len;i++)
 	 {
	     printf("%c",str[i]);
	     sleep(100);
	 }
 }

int main(void)
{
 	printf("Anleb : ");
	sleep(1000);
 	char string1[] = "I am Anleb,nice to somthing!\n";
	Show(string1);
 	printf("Anleb : ");
 	sleep(1000);
 	char string2[] = "Go,gay!\n";
	Show(string2);
	printf("Please Enter the Path:");
	char path[128];
	gets(path);
	while(strlen(path) == 0)
	{
	 				printf("Warning:The Path value is Null!\n");
	 				printf("Please Enter the Path:");
	 				gets(path);
					}
	if(strcmp(path,"exit") ==0)
		return 0;
	printf("Please Enter the ExtName:");
	char extName[10];
	gets(extName);
	while(strlen(extName) == 0)
	{
	 				printf("Warning:The ExtName value is Null!\n");
	 				printf("Please Enter the ExtName:");
	 				gets(extName);
					}
	if(strcmp(extName,"exit") ==0)
		return 0;
	findAllFile(path,extName);
	printf("\nDelete Count: %d\n",count);
 	system("pause");
 	return 0;
}