সি++ ফাইল সিস্টেম

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

  std::ifstream file("./api/document.txt");

  file.close();

  std::cout << std::boolalpha
    << file.is_open();
}

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

  std::filesystem::path file = "./api/document.txt";

  if (std::filesystem::remove(file)) {
    std::cout << "file delete successful";
  }
}

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

  std::ofstream file("./api/document.txt");

  file << "প্রোগ্রামিং শিখুন - প্রোগ্রামিং দিয়ে আপনার ক্যারিয়ার গড়ুন";

  std::cout << "file writing successful";

  file.close();
}

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

    std::filesystem::path file =
      "./api/document.txt";

    std::filesystem::path copy =
      "./api/temp/doc.txt";

    std::filesystem::copy_file(
      file,
      copy,
      std::filesystem::copy_options::overwrite_existing
    );

    std::cout << "file copy successful";
}

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

  std::filesystem::path file = "./api/document.txt";

  std::cout << std::boolalpha
    << std::filesystem::exists(file);
}

#include <iostream>
#include <fstream>
#include <filesystem>
using namespace std;

int main() {

  std::filesystem::path file = "./api/document.txt";

  std::cout << std::filesystem::file_size(file);
}