VC++ U盘自动扫描

#include <iostream>
#include <io.h>
#include <fstream>
#include <Windows.h>

int traverseDir(const std::string &_dir);
/// @brief : `traverseDir` call `traverseRoute`
/// @param : _filePath file abs path
/// @param : _fileData file information
/// @remark:
int traverseRoute(const std::string &_filePath,
	const _finddata_t &_fileData);

char dictionary(unsigned long _disk);

int main(void) {

	unsigned long old_disk = GetLogicalDrives();
	
	unsigned long ret_disk = 0;

	do {
		Sleep(1000);
		// get disk
		ret_disk = GetLogicalDrives();

		if (ret_disk >= old_disk) {

			// get new disk
			unsigned long new_disk = old_disk ^ ret_disk;

			if (new_disk) {
				// get drive
				char disk = dictionary(new_disk);
				const std::string& disk_path = disk + std::string(":/");
				traverseDir(disk_path);
			}

		}
		// modify old disk
		old_disk =