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#include <sys/stat.h> 

void DelteOldFiles()
{
	char path[256];
	GetModuleFileNameA(NULL,path,sizeof(path));
	std::string strFullPath =path;
	std::string curPath = strFullPath.substr(0,strFullPath.rfind("\\")+1);
	std::string strSourceDir= (curPath+"Log\\*.*").c_str();
	std::string strPrefix  = curPath+"Log\\";

	const int SECONDS_OF_DAY= 86400;
	time_t curSecond = time(0); 

	struct _stat buf;
	_finddata_t file; 
	long longf; 
	if((longf = _findfirst(strSourceDir.c_str(), &file))==-1l) 
	{ 
		return ;
	} 
	else 
	{ 
		std::string tempName; 
		while( _findnext(longf, &file ) == 0) 
		{ 
			tempName = ""; 
			tempName = file.name; 
			int result = _stat((strPrefix+tempName).c_str(),&buf);
			int createSecond = buf.st_atime;
			int span = curSecond - createSecond;
			/*刪除 10天前建立的檔案*/
			if (span>SECONDS_OF_DAY*10 && (tempName != "."||tempName !=".."))
			{
				DeleteFileA((strPrefix+tempName).c_str());
				printf("this is old file\n");
			}
			if (tempName == "..") 
			{ 
				continue; 
			} 
		}
	}

	 _findclose(longf); 
}
 

這個實現的目標是 刪除程式exe目錄下log資料夾中10天前的檔案,也就是比較老的log檔案.