Text file saving cpp with split

// WriteFile.cpp : main project file.

#include "stdafx.h"
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

using namespace System;
using namespace std;

template<typename T>
vector<T>
split(const T & str, const T & delimiters) {
    vector<T> v;
    T::size_type start = 0;
    auto pos = str.find_first_of(delimiters, start);
    while(pos != T::npos) {
        if(pos != start) // ignore empty tokens
            v.emplace_back(str, start, pos - start);
        start = pos+1;
        pos = str.find_first_of(delimiters, start);
    }
    if(start < str.length()) // ignore trailing delimiter
        v.emplace_back(str, start, str.length() - start); // add what's left of the string
    return v;
}

int main(array<System::String ^> ^args)
{
    ifstream readFile("TEST.TXT");
    string line;

    if (readFile) {
        cout << "found file" << endl;
        while (getline (readFile,line) ) {
            vector<string> s = split<string>(line, ":");
            cout << s[0] << endl << s[1] << endl;
        }
    } else {
        cout << "unable to open text file" << endl;
        ofstream out("TEST.TXT");
        if (out) {
        out << "LINE1:HELLO" << endl;
        out << "LINE2:WORLD" << endl;
        } else {
            cout << "COULD NOT CREATE FILE" << endl;
        }
    }

    int i;
    cin >> i;

    return 0;
}