code: сделал правки в вывод ошибки

project/main.cpp

@@ -59,7 +59,7 @@ download(const string& address)
         curl_easy_cleanup(curl);
         if (res != CURLE_OK)
         {
-            cout << curl_easy_strerror;
+            fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
             exit(1);
         }
     }

project/pr3.cbp

@@ -31,7 +31,12 @@
 		<Compiler>
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
+			<Add directory="curl/include" />
 		</Compiler>
+		<Linker>
+			<Add library="libcurl.dll.a" />
+			<Add directory="curl/lib" />
+		</Linker>
 		<Unit filename=".gitignore" />
 		<Unit filename="histogram.cpp" />
 		<Unit filename="histogram.h" />