Add a new line using String^ in C++

Question

I'm writing a program where you can enter text and output a text file with that text.

I have this:

int _tmain(int argc, _TCHAR* argv[])
{
    String^ fileName = "registry.txt";
    String^ out;

    StreamWriter^ sw = gcnew StreamWriter(fileName);

    out = "hi";
    out = out + "\n how you doing?";

    sw->WriteLine(out);

    sw->Close();
}

Basically I want this:

hi
how you doing?

But what I get is this:

hi how you doing?

How can I fix it?

Answer 1

Use static data member Environment::NewLine

For example

out = out + Environment::NewLine + " how you doing?";

Or you can explicitly specfy escape control symbol '\r' along with '\n' used in Windows to separate lines.

out = out + "\r\n how you doing?";

Here is an example of using the both methods

#include "stdafx.h"

using namespace System;
using namespace System::IO;

int main(array<System::String ^> ^args)
{
    String ^fileName( "Data.txt" );
    String^ out;

    StreamWriter^ sw = gcnew StreamWriter( fileName );

    out = "hi";
    out = out + "\r\n how you doing?";

    sw->WriteLine(out);

    out = "hi";
    out = out + Environment::NewLine + " how you doing?";

    sw->WriteLine(out);

    sw->Close();

    return 0;
}

The output is

hi
 how you doing?
hi
 how you doing?