diff --git a/.gitignore b/.gitignore
index 1a85222..55d7157 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 bin/
 obj/
+curl/
 *.cbp
 *.layout
 *.depend
diff --git a/histogram_internal.h b/histogram_internal.h
index 0187157..945d37c 100644
--- a/histogram_internal.h
+++ b/histogram_internal.h
@@ -1,10 +1,6 @@
 #ifndef HISTOGRAM_INTERNAL_H_INCLUDED
 #define HISTOGRAM_INTERNAL_H_INCLUDED
 
-#include <vector>
-
 void find_minmax(const std::vector<double>& numbers, double& min, double& max);
 
-double calculate_average_height(const std::vector<size_t>& bins);
-
 #endif // HISTOGRAM_INTERNAL_H_INCLUDED
diff --git a/main.cpp b/main.cpp
index 16b174a..986cec4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -3,6 +3,8 @@
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
+#include <curl/curl.h>
+
 using namespace std;
 
 struct Input {
@@ -10,18 +12,24 @@ struct Input {
     size_t bin_count;
 };
 
-Input input_data(istream& in) {
+Input input_data(istream& in, bool prompt) {
    Input inp;
     size_t number_count;
-    cerr << "Enter number count: ";
+    if (prompt){
+        cerr << "Enter number count: ";
+    }
     cin >> number_count;
     inp.numbers.resize(number_count);
-    cerr << "Enter numbers: ";
+    if (prompt){
+                cerr << "Enter numbers: ";
+        }
     for (size_t i = 0; i < number_count; i++) {
         cin >> inp.numbers[i];
     }
 
-    cerr << "Enter bin count: ";
+    if (prompt) {
+            cerr << "Enter bin count: ";
+    }
     cin >> inp.bin_count;
     return inp;
 }
@@ -29,7 +37,8 @@ Input input_data(istream& in) {
 
 
 int main() {
-    auto in = input_data(cin);
+    curl_global_init(CURL_GLOBAL_ALL);
+    auto in = input_data(cin, true);
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
     return 0;