why am i getting E0276 and like 70 other errors? Heres some parts of my code, it is a recreation of the 1975 Oregon trail game.

[Bb-gun75]

I am currently working on converting save and load files to binary and back. I have copied my professors code line by line for this function but it isn't working. Help?? I am using VS 2022. New to gitHub, sorry.

#include <cstdio>
#include <chrono>
#include <cmath>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <iomanip>
#include<limits>
#include <random>
#include <string>
#include <cctype>

using std::cout;
using std::endl;
using std::cin;
using std::string;
using std::random_device;
using std::uniform_int_distribution;
using std::chrono::high_resolution_clock;
using std::chrono::duration;
using std::ios;
using std::ifstream;
using std::ofstream;
using std::string;
using std::numeric_limits;
using std::streamsize;
using std::getline;
using std::ios;

void loadGame() {

    validateInventory();

    using std::filesystem::current_path;
    using std::filesystem::path;
    using std::filesystem::exists;

    //build the absolut4e file path and keep going if it already exists
    path filePath{ current_path().append(SAVEFILE) };
    if (exists(filepath)) {
        cout << filepath.string();

        if (fileStream.is_open()) filestream.close();
        switch (fileFormat)
        {
        case TEXT:
        {
            filestream.open(filepath, ios::in);
            if (filestream.good())
            {
                //integer status data
                fileStream << status.miles << endl;
                fileStream << status.turn << endl;
                fileStream << status.oxen << endl;
                fileStream << status.food << endl;
                fileStream << status.ammo << endl;
                fileStream << status.clothes << endl;
                fileStream << status.misc << endl;
                fileStream << status.cash << endl;
                fileStream << fortAvailable << endl;

                //boolean status data
                fileStream << status.blueMountainsCleared << endl;
                fileStream << status.haveIllness << endl;
                fileStream << status.haveInjury << endl;
                fileStream << status.isDead << endl;
                fileStream << status.southPassCleared << endl;

                // choice data
                fileStream << choice.eat << endl;
                fileStream << choice.turn << endl;
                fileStream << choice.action << endl;
            }
            break;
        }
        case BINARY:
        {
            fileStream.open(SAVEFILE, ios::out | ios::binary);
            fileSystem.write(reinterperet_cast<char*>(&status), sizeof(status));
            fileSystem.write(reinterperet_cast<char*>(&choice), sizeof(choice));
        }
    }
    fileStream.close();

    }
}

[Bb-gun75]

I figured it out... mostly. Wrong c++ version. Still saying fileStream is unidentified though.