#include <curl/curl.h>

[...]

FILE* destFile = fopen("index.html"‚ "w");

if (!destFile)
{
    cout<<"KO: Ne peut creer le fichier"<<endl;
    exit(1);
}

CURL* curl = curl_easy_init();
CURLcode res;

if (!curl)
{
    cout<<"KO: Ne peut initialiser CURL"<<endl;
    exit(1);
}

curl_easy_setopt(curl‚ CURLOPT_FAILONERROR‚ 1);
curl_easy_setopt(curl‚ CURLOPT_WRITEFUNCTION‚ fwrite);
curl_easy_setopt(curl‚ CURLOPT_WRITEDATA‚ destFile);
curl_easy_setopt(curl‚ CURLOPT_URL‚ "http://www.siteduzero.com/index.php");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);