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PO
primarykey
Id
612112
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2009-03-04T19:38:49.640
FavoriteCount
0
LastActivityDate
2018-03-29T20:30:42.820
LastEditDate
2018-03-29T20:30:42.820
LastEditorUserId
868546
OwnerUserId
3153
ParentId
612097
PostTypeId
2
Score
212
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0
LastEditorDisplayName
Brian R. Bondy
text
Body
Unfortunately the C++ standard does not define a standard way of working with files and folders in this way. Since there is no cross platform way, the best cross platform way is to use a library such as the <a href="http://www.boost.org/doc/libs/1_38_0/libs/filesystem/doc/index.htm" rel="noreferrer">boost filesystem module</a>. Cross platform boost method: <blockquote> The following function, given a directory path and a file name, recursively searches the directory and its sub-directories for the file name, returning a bool, and if successful, the path to the file that was found. </blockquote> <pre><code>bool find_file(const path & dir_path, // in this directory, const std::string & file_name, // search for this name, path & path_found) // placing path here if found { if (!exists(dir_path)) return false; directory_iterator end_itr; // default construction yields past-the-end for (directory_iterator itr(dir_path); itr != end_itr; ++itr) { if (is_directory(itr->status())) { if (find_file(itr->path(), file_name, path_found)) return true; } else if (itr->leaf() == file_name) // see below { path_found = itr->path(); return true; } } return false; } </code></pre> Source from the boost page mentioned above. <hr> For Unix/Linux based systems: You can use <a href="http://www.manpagez.com/man/3/opendir/" rel="noreferrer">opendir</a> / <a href="http://www.manpagez.com/man/3/readdir/" rel="noreferrer">readdir</a> / <a href="http://www.manpagez.com/man/3/closedir/" rel="noreferrer">closedir</a>. <blockquote> Sample code which searches a directory for entry ``name'' is: </blockquote> <pre><code> len = strlen(name); dirp = opendir("."); while ((dp = readdir(dirp)) != NULL) if (dp->d_namlen == len && !strcmp(dp->d_name, name)) { (void)closedir(dirp); return FOUND; } (void)closedir(dirp); return NOT_FOUND; </code></pre> Source code from the above man pages. <hr> For a windows based systems: you can use the Win32 API <a href="http://msdn.microsoft.com/en-us/library/aa364418(VS.85).aspx" rel="noreferrer">FindFirstFile</a> / <a href="http://msdn.microsoft.com/en-us/library/aa364428(VS.85).aspx" rel="noreferrer">FindNextFile</a> / <a href="http://msdn.microsoft.com/en-us/library/aa364413(VS.85).aspx" rel="noreferrer">FindClose</a> functions. <blockquote> The following C++ example shows you a minimal use of FindFirstFile. </blockquote> <pre><code>#include <windows.h> #include <tchar.h> #include <stdio.h> void _tmain(int argc, TCHAR *argv[]) { WIN32_FIND_DATA FindFileData; HANDLE hFind; if( argc != 2 ) { _tprintf(TEXT("Usage: %s [target_file]\n"), argv[0]); return; } _tprintf (TEXT("Target file is %s\n"), argv[1]); hFind = FindFirstFile(argv[1], &FindFileData); if (hFind == INVALID_HANDLE_VALUE) { printf ("FindFirstFile failed (%d)\n", GetLastError()); return; } else { _tprintf (TEXT("The first file found is %s\n"), FindFileData.cFileName); FindClose(hFind); } } </code></pre> Source code from the above msdn pages.
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1. POHow can I get the list of files in a directory using C or C++?
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1. USDrise
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1. USBrian R. Bondy
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