通过C++从目录中过滤特定文件类型

我想通过行#25"if (file.cFileName[i - 1] ==(WCHAR("打印出目录中的特定文件tpye(cpp，cxx，cpy...(。 && file.cFileName[i] == (WCHAR("c"("进行WCHAR比较，但似乎它有效。 有人对此有想法吗？ 谢谢。

#include "stdafx.h"
#include <Windows.h>
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
void FindFile(const std::wstring &directory)
{
std::wstring tmp = directory + L"\*";
WIN32_FIND_DATAW file;
HANDLE search_handle = FindFirstFileW(tmp.c_str(), &file);
if (search_handle != INVALID_HANDLE_VALUE)
{
std::vector<std::wstring> directories;
do
{
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
if ((!lstrcmpW(file.cFileName, L".")) || (!lstrcmpW(file.cFileName, L"..")))
continue;
}
for (int i = 0; file.cFileName[i] != NULL; i++) {
if (file.cFileName[i - 1] ==(WCHAR)"." && file.cFileName[i] == (WCHAR)"c")
{
tmp = directory + L"\" + std::wstring(file.cFileName);
std::wcout << tmp << std::endl;//print of the directory,endl->end line
}
}
if (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
directories.push_back(tmp);
} while (FindNextFileW(search_handle, &file));
FindClose(search_handle);
for (std::vector<std::wstring>::iterator iter = directories.begin(), end = directories.end(); iter != end; ++iter)
FindFile(*iter);
}
}
int main()
{
FindFile(L"C:\EF670610");
cout << "Press Enter to continue " << endl;
cin.get();
return 0;
}