Convert file to hex and back

[Bingocat4]

I am trying to make a program that will load any file and convert it to a vector of hex values and then turn those back into the file that was loaded, but it only is working with files that have text only in them. If I try to open an image file or any others, Windows tells me that it is unable to open them. If I open the original file and the copy in notepad++, it seems like the files are exactly the same, but the copy still will not open. What am I doing wrong here?

#include <iostream>
#include <sstream>
#include <fstream>
#include <vector>

using namespace std;

bool exists(string name) {
	fstream file(name);
	return file.good();
}

vector<char> LoadTempFile() {
	vector<char> fileData;

	fstream file;
	string loadedFile = "";
	
	cout << "Loading File..." << endl;
	file.open("temp.txt");
	if (file.good()) {
		while (!file.eof()) {
			string temp;
			getline(file, temp);
			loadedFile += temp;
		}
	}

	string data = loadedFile.substr(loadedFile.find_first_of('{') + 1, loadedFile.find_last_of('}') - loadedFile.find_first_of('{') - 1);

	stringstream ss(data);
	string token;
	cout << "Converting..." << endl;
	while (getline(ss, token, ',')) {
		stringstream convert(token);
		int value;
		convert >> hex >> value;
		fileData.push_back(value);
	}

	return fileData;
}

int main() {
	system("cls");
	string fileName;
	cout << "Enter file name to convert: ";
	getline(cin, fileName);
	if (!exists(fileName)) {
		cout << "Can't find file" << endl;
		system("pause");
		main();
	}

	string newFileName = "newFile" + fileName.substr(fileName.find_last_of('.'), string::npos);

	string command = "bin2h.exe file<" + fileName + ">temp.txt"; //program used to convert to hex
	system(command.c_str());

	vector<char> loadedTemp = LoadTempFile();

	cout << "Writing to new file..." << endl;
	fstream newFile;
	newFile.open(newFileName, ios::out);

	std::stringstream ss;
	for (unsigned i = 0; i < loadedTemp.size(); i++) {
		newFile << loadedTemp[i];
	}
	newFile.close();
	system("del temp.txt");
}

[Bingocat4]

Ok I figured out the problem.

fstream newFile;
	newFile.open(newFileName, ios::out);

should be

fstream newFile(newFileName, ios::out | ios::binary);