Preprocessing a file to remove all \n or endline characters from file and print results to new file

[sunshine4]

The following code removes the endline character from all lines of the doc_word_test.txt file and prints correctly to the screen (or command prompt). However, only a few words from the middle of the doc_word_test.txt file gets printed to the new_doc_file.txt. How do I get the code to correctly remove the endline character from the original file and print to the new file without any of the newline characters?

  #include <Windows.h>
#include <math.h>
#include "pch.h"
#include <cmath>
#include <fstream>
#include <iostream>
#include <sstream>
#include <conio.h>
#include <stdio.h>
#include <string>
#include <sstream>
#include <algorithm>
#include <vector>
#include <sstream>
#include <cctype>
#include <iomanip>
#include <iostream>       // std::cout
#include <string>         // std::string
#include <cstddef>        // std::size_t


using namespace std;

 int main()
{
	vector<vector<string> > my2Dvector;
	vector<vector<string> > temp;
	vector<vector<string> > v;
	ifstream file("doc_word_test.txt");
	string line, str_count, str;
	int vector_counter, move;
	move = 1;
	ofstream file_;

	
	while (getline(file, line))
	{
		istringstream iss(line);
		string value;
		vector<string> my1Dvector;

		file_.open("new_doc_file.txt");

		while (iss >> value)
		{
			for (int i = 0; i < value.length(); i++) {

				if (value[i] == '\n') {
					value[i] = ' ';
				}
			}
			file_ << value << ' ';
			cout << value << ' ';




		}
	
		file_.close();
	}

	return 0;
}

[Peter87]

ifstream in("doc_word_test.txt");
ofstream out("new_doc_file.txt");

string line;
while (getline(in, line))
{
	out << line;
}

[lastchance]

#include <iostream>
#include <fstream>
#include <iterator>
#include <algorithm>
using namespace std;

using it = istream_iterator<char>;
using ot = ostream_iterator<char>;

int main()
{
   ifstream in( "doc_word_test.txt" );
   ofstream out( "new_doc_file.txt" );
   replace_copy( it{ in >> noskipws }, it{}, ot{ out }, '\n', ' ' );
}

[sunshine4]

Thanks a bunch...this worked. :=))