Как скачивать изображения из ВК по Url ссылкам?

gd1xza, и как это исправить?

Как скачивать изображения из ВК по Url ссылкам?

gd1xza,

.pro
win32: LIBS += -LC:/curl/lib
INCLUDEPATH += C:/curl/include
DEPENDPATH += C:/curl/include

.cpp

#include <stdio.h>
#include <string>
#include <curl/curl.h>

size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
    size_t written = fwrite(ptr, size, nmemb, stream);
    return written;
}

B_001Download::B_001Download(QObject *parent) : QObject(parent)
{

}

void B_001Download::download()
{
    CURL *curl;
        FILE *fp;
        CURLcode res;
        char *url = "http://zzz.xx/example.txt";
        char outfilename[FILENAME_MAX] = "C:\\example.txt";
        curl = curl_easy_init();
        if (curl) {
            fp = fopen(outfilename,"wb");
            curl_easy_setopt(curl, CURLOPT_URL, url);
            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
            curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
            res = curl_easy_perform(curl);
            /* always cleanup */
            curl_easy_cleanup(curl);
            fclose(fp);
        }
}

undefined reference to __imp_curl_easy_init'
undefined reference to __imp_curl_easy_setopt'
undefined reference to __imp_curl_easy_setopt'
undefined reference to __imp_curl_easy_setopt'
undefined reference to __imp_curl_easy_perform'
undefined reference to __imp_curl_easy_cleanup'