C++17 filesystem整理資料夾檔案實作

 

 C++程式碼如下:

#include <iostream>
#include <filesystem>
#include <string>
using namespace std;
using namespace std::filesystem;
int main()
try
{
	cout << "使用filesystem要先調專案屬性到C++17!!\n";
 
	cout << "如果不知本專案所在path就試一下下面:\n";
	path basePath = current_path();
	cout <<basePath << endl;

	if (!exists(path("images"))) {
		create_directory("images");
 		cout << "mkdir images\n";
 	}
 	int i = 0;
 	for (const auto& entry : recursive_directory_iterator("D:\\cpp\\test_cv_dnn"))
 	{
 		if (entry.is_regular_file())
 		{
 			path ff = entry.path();
 			string fn = entry.path().string();
 			int pos = -1;
 			if ((pos = fn.rfind(".jpg")) == fn.length() - 4) {
 				cout << "pos=" << pos << "\t" << fn << endl;
 				string toFile ="images\\"+ to_string(i) + ".jpg";
 				copy_file(ff, path(toFile), copy_options::overwrite_existing);
 				cout << "已經copy圖檔" << fn << "到" << toFile << endl;
 				i++;
 			} 
 		} 
	}
 
 return 0;
}
catch (exception& e) {
	cerr << e.what();
	return 1;
}