diff --git a/Histogram/main.cpp b/Histogram/main.cpp
index e52c145..f463122 100644
--- a/Histogram/main.cpp
+++ b/Histogram/main.cpp
@@ -4,6 +4,7 @@
 #include "text.h"
 #include <string>
 #include <sstream>
+#include <curl/curl.h>
 struct Input{
     std::vector<double> numbers;
     size_t bin_count{};
@@ -37,7 +38,14 @@ Input input_data(std::istream& in, bool prompt) {
 
 using namespace std;
 
-int main() {
+int main(int argc, char* argv[]) {
+    if (argc>1){
+        cerr << "argc = "    << argc << endl;
+        for (int i=0; i < argc; ++i){
+            cerr << "argv[" << i << "] = " << argv[i] << endl;
+        }
+        return 0;
+    }
     Input in = input_data(std::cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);