diff --git a/main.cpp b/main.cpp
index 0e9d37f..31bef32 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,8 @@
 #include <iostream>
 #include <vector>
 #include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
 #include <curl/curl.h>
 #include "histogram.h"
 #include "text.h"
@@ -46,7 +48,12 @@ int main(int argc, char* argv[])
             CURLcode res;
             curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
             res = curl_easy_perform(curl);
-            curl_easy_cleanup(curl);
+            if (res != 0)
+            {
+                cout << curl_easy_strerror(res);
+                exit(1);
+            }
+
         }
         return 0;
     }
@@ -55,5 +62,6 @@ int main(int argc, char* argv[])
     auto B = make_histogram(in.A, in.bin);
     show_histogram_svg (B);
 
+    system("pause");
     return 0;
 }