сделал обработку ошибок

project/main.cpp

@@ -32,11 +32,22 @@ input_data(istream& tin, bool prompt)
 }
 int main(int argc, char* argv[])
 {
-    if(argc>1)
+    if(argc > 1)
     {
-        for(size_t i = 0;i < argc;i++)
+        CURL *curl = curl_easy_init();
+        if(curl)
         {
-            cerr<< "argv["<<i<<"]="<<argv[i]<<endl;
+            CURLcode res;
+            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+            res = curl_easy_perform(curl);
+            curl_easy_cleanup(curl);
+            if(res != CURLE_OK)
+            {
+                fprintf(stderr, "curl_easy_perform() failed: %s\n",
+                        curl_easy_strerror(res));
+                exit(1);
+            }
+            cerr << res;
         }
         return 0;
     }
@@ -44,5 +55,6 @@ int main(int argc, char* argv[])
     Input in = input_data(cin,true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
+    getch();
     return 0;
 }

project/project.cbp

@@ -13,7 +13,12 @@
 				<Option compiler="gcc" />
 				<Compiler>
 					<Add option="-g" />
+					<Add directory="curl/include" />
 				</Compiler>
+				<Linker>
+					<Add library="libcurl.dll.a" />
+					<Add directory="curl/lib" />
+				</Linker>
 			</Target>
 			<Target title="Release">
 				<Option output="bin/Release/project" prefix_auto="1" extension_auto="1" />