diff --git a/main.cpp b/main.cpp
index 47a274a..5bfc7ba 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,66 +1,75 @@
 #include <iostream>
 #include <vector>
 using namespace std;
-int main()
-{
+
+struct Input {
+    vector<double> numbers;
+    size_t bin_count{};
+};
+
+Input
+input_data() {
     size_t number_count;
-    cerr << "Enter number count: ";
+    cout << "Enter number count: ";
     cin >> number_count;
-
+    Input in;
+    in.numbers.resize(number_count);
     vector<double> numbers(number_count);
-    for (size_t i=0; i<number_count; i++)
+    for (size_t i = 0; i < number_count; i++)
     {
-        cin>>numbers[i];
+        cin >> in.numbers[i];
     }
     size_t bin_count;
-    cerr << "Enter count bin: ";
-    cin >>bin_count;
-    size_t interval;
-        cerr << "Enter interval: ";
-        cin >> interval;
-        double min = numbers[0];
-        double max = numbers[0];
-        for (double x : numbers)
-        {
-            if (x < min)
-            {
-                min = x;
-            }
-            else if (x > max)
-            {
+    cout << "Enter count bin : ";
+    cin >> in.bin_count;
+    return in;
+}
+
+void
+find_minmax(const vector<double>& numbers, double& min, double& max) {
+    min = numbers[0];
+    max = numbers[0];
+    for (double x : numbers) {
+        if (x < min) {
+            min = x;
+        }
+        else if (x > max) {
                 max = x;
-            }
         }
-    vector<size_t> bins(bin_count);
+    }
+}
 
+vector <double>
+make_histogram(const vector<double>& numbers, size_t bin_count){
+    vector<double> bins (bin_count);
+    double min = 0, max = 0;
+    find_minmax(numbers, min, max);
     double bin_size = (max - min) / bin_count;
-    for (size_t i = 0; i < number_count; i++)
-    {
-        bool found = false;
-        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
-        {
-            auto lo = min + j * bin_size;
-            auto hi = min + (j + 1) * bin_size;
-            if ((lo <= numbers[i]) && (numbers[i] < hi))
-            {
-                bins[j]++;
-                found = true;
+    for (int i = 0; i < numbers.size(); i++) {
+            bool found = false;
+            for (int j = 0; (j < bin_count - 1) && !found; j++) {
+                auto lo = min + j * bin_size;
+                auto hi = min + (j + 1) * bin_size;
+                if ((lo <= numbers[i]) && (numbers[i] < hi)) {
+                    bins[j]++;
+                    found = true;
+                }
+            }
+            if (!found) {
+                bins[bin_count - 1]++;
             }
-        }
-        if (!found)
-        {
-            bins[bin_count - 1]++;
-        }
     }
-       const size_t SCREEN_WIDTH = 80;
-       const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-       size_t height = 0;
-       size_t bin_max =0;
-       for (double y : bins)
+    return bins;
+}
+
+void
+show_histogram_text (const vector<double>& bins,size_t MAX_ASTERISK, size_t bin_count){
+    size_t bin_max = 0;
+    size_t height = 0;
+    for (double x : bins)
     {
-        if (y > bin_max)
-        {
-            bin_max = y;
+        if (x > bin_max){
+                bin_max = x;
         }
     }
     for (size_t bin: bins)
@@ -82,46 +91,15 @@ int main()
         }
         cout << endl;
     }
-        size_t len_numb = 0;
-        size_t maxbin = bins[0];
-        if (interval < 4 and interval > 9){
-            cout << "ERROR";
-        }
-        else{
-            for (size_t bin: bins)
-        {
-            if (bin>maxbin){
-                maxbin=bin;
-
-            }
-        }
-        size_t maxb=maxbin;
-        while(maxbin){
-            maxbin/=10;
-            len_numb++;
-        }
-        for(size_t j=1; j<=len_numb; j++){
-            cout<<" ";
-        }
-        cout<<"|";
-        int int_part;
-        if (maxb%interval==0){
-            int_part=maxb/interval;
-        }
-        else{
-            int_part=(maxb/interval)+1;
-        }
-        for(size_t i=1;i<=int_part;i++){
-            cout<<"-----|";
-        }
-        cout<<endl;
-        for(size_t j=1; j<=len_numb; j++){
-            cout<<" ";
-        }
-        cout<<"0     "<<interval;
-        for(size_t i=1;i<int_part;i++){
-            cout<<"     "<<interval*int_part;
-        }
 }
+
+
+int main(){
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    show_histogram_text(bins, MAX_ASTERISK, in.bin_count);
     return 0;
 }
+