Writing and reading strange letters to a txt-file using libcurl - html

Question

I have a c++ program that downloads the HTML-code of a webpage and saves it as a text file using the library LibCurl. The problem is, that we have the following strange letters in danish alphabet: Æ æ Ø ø Å å.
When I try to read the HTML-code line by line, all these characters look like "�". I have tried to read/write the file as wide characters. That did not work.
I have also tried to write a sentence containing "æ", "ø" og "å" to another text file and read it again. That, for some reason, worked.
So my question is, why does the strange letters look like "�" when they are in the downloaded HTML-code but not when I write my own sentence? And how do I fix the HTML-output?
My code is as follows:
#include <iostream>
#include <string>
#include<fstream>
#include<curl/curl.h>
using namespace std;
static size_t write_data (string * ptr, size_t size, size_t nmemb,void *stream)
{
size_t written = fwrite (ptr, size, nmemb, (FILE *) stream);
cout << static_cast <const void *> (ptr);
return written;
//string myString (ptr, nbytes);
}
//string myString (ptr, nbytes);
int main ()
{
// Writing weird characters to a text-file!
ofstream myfile;
myfile.open ("example.txt");
myfile << "Print strange letter: æ ø og å!";
myfile.close ();
// Reading weird characters from the text-file!
std::ifstream wif ("example.txt");
if (wif.is_open ())
{
std::string wline;
while (std::getline (wif, wline))
{
cout << wline << endl;
}
}
else
cout << "Could not open file" << endl ;
wif.close ();
cout << endl << endl;
// Download the HTML-code from a webpage and save it.
CURL *curl_handle;
static const char *pagefilename = "example2.txt";
const char *charUrl = "http://politiken.dk/forbrugogliv/sundhedogmotion/ECE3406716/mindst-85000-offentligt-ansatte-maa-slet-ikke-ryge-i-arbejdstiden/"; // An article from the danish newspaper "Politiken"
FILE *pagefile;
curl_global_init (CURL_GLOBAL_ALL);
curl_handle = curl_easy_init ();
curl_easy_setopt (curl_handle, CURLOPT_URL, charUrl); // HERE IS THE URL PASSED!
curl_easy_setopt (curl_handle, CURLOPT_VERBOSE, 0L);
curl_easy_setopt (curl_handle, CURLOPT_NOPROGRESS, 0L);
curl_easy_setopt (curl_handle, CURLOPT_WRITEFUNCTION, write_data);
pagefile = fopen (pagefilename, "wb");
if (pagefile)
{
curl_easy_setopt (curl_handle, CURLOPT_WRITEDATA, pagefile);
curl_easy_perform (curl_handle);
fclose (pagefile);
}
curl_easy_cleanup (curl_handle);
//Reading the HTML-code
ifstream webIn ("example2.txt");
if (webIn.is_open ())
{
std::string wline;
while (getline (webIn, wline))
{
cout << wline << endl;
}
}
else
cout << "Could not open example.txt" << endl;
return 0;
}
And my output is
Print strange letter: æ ø og å!
>>HTML-CODE CONTAINING "�" instead of æ ø å <<
I don't know if it is relevant, but my OS is Linux Mint 17.3 and I've set the language and region og my system to "English, Denmark UTF-8".
Thanks in advance! I will really appreciate any help or hints :)