Как установить соединение с сайтом по https из программы на c++?

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#include 
#include 
#include 

void ssl_connect(const char *hostname, const int port)
{
    SSL_library_init();
    SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_client_method());

    BIO *bio = BIO_new_ssl_connect(ssl_ctx);

    BIO_get_ssl(bio, NULL);
    BIO_set_conn_hostname(bio, hostname);
    BIO_set_conn_port(bio, std::to_string(port).c_str());

    if (BIO_do_connect(bio) <= 0)
    {
        ERR_print_errors_fp(stderr);
        exit(EXIT_FAILURE);
    }
    else
    {
        printf("Connected to %s:%d
", hostname, port);
    }

    SSL *ssl;
    SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_NONE, NULL);
    SSL_CTX_set_verify_depth(ssl_ctx, 1);
    SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);

    ssl = SSL_new(ssl_ctx);
    SSL_set_bio(ssl, bio, bio);

    if (SSL_connect(ssl) < 0)
    {
        ERR_print_errors_fp(stderr);
        exit(EXIT_FAILURE);
    }
    else
    {
        printf("SSL connection established
");
    }

    SSL_CTX_free(ssl_ctx);
    SSL_shutdown(ssl);
    SSL_free(ssl);
}

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#include <iostream>
#include <curl/curl.h>

size_t writeCallback(void *contents, size_t size, size_t nmemb, std::string *buffer)
{
    size_t realsize = size * nmemb;
    buffer->append((char*)contents, realsize);
    return realsize;
}

int main()
{
    CURL *curl;
    CURLcode res;
    std::string readBuffer;

    curl = curl_easy_init();
    if (curl)
    {
        curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);

        res = curl_easy_perform(curl);
        if (res != CURLE_OK)
        {
            fprintf(stderr, "curl_easy_perform() failed: %s
",
                curl_easy_strerror(res));
        }
        else
        {
            std::cout << "Received data: " << readBuffer << std::endl;
        }

        curl_easy_cleanup(curl);
    }

    return 0;
}