Store Data in memory to access later on - c++

Question

New to C++. I have a code that spins thru directories to look for a specific file (123.txt) and lists the result in a textbox. What i need to do is store these result in memory so i can access it later. An array maybe? I'm not exactly sure how that's done.
Here's the code to execute it:
outfile1.open("pxutil1.log");
DWORD dwSize = MAX_PATH;
char szLogicalDrives[MAX_PATH];
DWORD dwResult = GetLogicalDriveStrings(dwSize, szLogicalDrives);
if (dwResult == 0)
{
// error handling...
}
else if (dwResult > MAX_PATH)
{
// not enough buffer space...
}
else
{
for (char* szSingleDrive = szLogicalDrives; *szSingleDrive != 0; szSingleDrive += (lstrlenA(szSingleDrive) + 1))
{
if (GetDriveTypeA(szSingleDrive) == DRIVE_FIXED)
FindFile(szSingleDrive);
}
}
Here's the code to search for 123.txt and list the restult in a logfile.
std::string dir = directory;
if ((!dir.empty()) && (dir.back() != '\\') && (dir.back() != '/'))
dir += '\\';
WIN32_FIND_DATAA file;
HANDLE search_handle = FindFirstFileA((dir + "*").c_str(), &file);
if (search_handle == INVALID_HANDLE_VALUE)
{
if (GetLastError() != ERROR_FILE_NOT_FOUND)
{
// error handling...
//::MessageBox(NULL, "File not found", "", MB_OK);
}
}
else
{
do
{
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
if ((lstrcmpA(file.cFileName, ".") != 0) && (lstrcmpA(file.cFileName, "..") != 0))
{
//FindFile(dir + file.cFileName);
if (!ExcludeDir(dir + file.cFileName))
{
FindFile(dir + file.cFileName);
}
}
}
else
{
if (lstrcmpA(file.cFileName, "123.txt") == 0)
{
outfile1 << dir.c_str() << endl; //write to log file
}
}
} while (FindNextFileA(search_handle, &file));
if (GetLastError() != ERROR_NO_MORE_FILES)
{
::MessageBox(NULL, "No more files", "", MB_OK);
}
FindClose(search_handle);
}
I thought maybe i could add this to the code, but it doesn't work
string listOfDir[20]
std::string(dir) >> listOfDir;

Answer 1

The standard C++ language does not have overloads of operator>> to input arrays.
The following does not work:
std::cin >> listOfDir;
The C++ language does not have any functions to split a string.
The following does not work:
std::string(dir) >> listOfDir;
The compiler can't find any overload of operator>> that takes a std::string parameter and an array parameter. The statement would be equivalent of:
operator>>(std::string, std::string[]);
In summary, you'll need to write the code yourself to parse or split a string; or you can search the internet for a string library.
If you use std::vector, this code may be more useful:
std::vector<std::string> listOfDir;
//...
listOfDir.push_back(dir);
The above code fragment appends a copy of dir to the vector listOfDir.