diff --git a/histogram.cpp b/histogram.cpp
new file mode 100644
index 0000000..d286cb6
--- /dev/null
+++ b/histogram.cpp
@@ -0,0 +1,36 @@
+#include "histogram.h"
+void static find_minmax(vector<double> vec, double& min, double& max) {
+    min = vec[0];
+    max = vec[0];
+    for (double x : vec) {
+        if (x < min) {
+            min = x;
+        }
+        else if (x > max)
+        {
+            max = x;
+        }
+    }
+}
+vector<size_t> make_histogram(size_t number, vector<double> vec) {
+    vector<size_t> bins(number);
+    double mn, mx;
+    find_minmax(vec, mn, mx);
+    float bin_size = (mx - mn) / number;
+    for (size_t i = 0; i < vec.size(); i++) {
+        bool fl = false;
+        for (size_t j = 0; (j < number - 1) && !fl; j++) {
+            auto lo = mn + j * bin_size;
+            auto hi = mn + (j + 1) * bin_size;
+            if ((lo <= vec[i]) && (vec[i] < hi)) {
+                bins[j]++;
+                fl = true;
+            }
+        }
+        if (!fl) {
+            bins[number - 1]++;
+
+        }
+    }
+    return bins;
+}
diff --git a/histogram.h b/histogram.h
new file mode 100644
index 0000000..1892457
--- /dev/null
+++ b/histogram.h
@@ -0,0 +1,5 @@
+#include <vector>
+#include <iostream>
+using namespace std;
+void static find_minmax(vector<double> vec, double& min, double& max);
+vector<size_t> make_histogram(size_t number, vector<double> vec);
diff --git a/main.cpp b/main.cpp
index 5c1117a..ba0f42f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,45 +1,24 @@
-#include <vector>
-#include <iostream>
-using namespace std;
-int main() {
-    size_t n;
-    int korz;
+#include "histogram.h"
+struct Input {
+    vector<double> vec;
+    size_t korz{};
+};
+Input input_data() {
+    Input in;
+    size_t n, korz;
+
     cerr << "Number of elem ";
     cin >> n;
-    vector<float> vec(n);
-    for (size_t i = 0; i < vec.size(); i++) {
-        //cout << i + 1 << ".";
-        cin >> vec[i];
-    }
-    cerr << "Number of baskets ";
-    cin >> korz;
-    vector<size_t> bins(korz);
-    double mn = vec[0];
-    double mx = vec[0];
-    for (double x : vec) {
-        if (x < mn) {
-            mn = x;
-        }
-        else if (x > mx) {
-            mx = x;
-        }
-    }
-    float bin_size = (mx - mn) / korz;
-    for (size_t i = 0; i < vec.size(); i++) {
-        bool fl = false;
-        for (size_t j = 0; (j < korz - 1) && !fl; j++) {
-            auto lo = mn + j * bin_size;
-            auto hi = mn + (j + 1) * bin_size;
-            if ((lo <= vec[i]) && (vec[i] < hi)) {
-                bins[j]++;
-                fl = true;
-            }
-        }
-        if (!fl) {
-            bins[korz - 1]++;
-
-        }
-    }
+    in.vec.resize(n);
+    for (size_t i = 0; i < n; i++)
+        cin >> in.vec[i];
+    cerr << "Enter bin count: ";
+    cin >> in.korz;
+    return in;
+}
+int main() {
+    auto in = input_data();
+    auto bins = make_histogram(in.korz, in.vec);
     bool gigant = false;
     auto spaces = 0;
     size_t mx_count = 0;
@@ -62,26 +41,26 @@ int main() {
     }
     if (spaces == 1) {
         for (size_t i = 0; i < bins.size(); i++) {
-            cout << "  " << bins[i] << "|";
+            std::cout << "  " << bins[i] << "|";
             if (gigant) {
                 if (bins[i] == mx_count) {
                     for (size_t j = 0; j < 76; j++) {
-                        cout << "*";
+                        std::cout << "*";
                     }
                 }
                 else
                 {
                     for (size_t j = 0; j < 76 * static_cast<double>(bins[i]) / mx_count; j++) {
-                        cout << "*";
+                        std::cout << "*";
                     }
                 }
             }
             else
             {
                 for (size_t j = 0; j < bins[i]; j++) {
-                    cout << "*";
+                    std::cout << "*";
                 }
-                cout << endl;
+                std::cout << std::endl;
             }
         }
     }
@@ -92,31 +71,31 @@ int main() {
             int k = bins[i];
             for (; k /= 10; ++len);
             while (len < spaces) {
-                cout << " ";
+                std::cout << " ";
                 len++;
             }
-            cout << bins[i];
-            cout << "|";
+            std::cout << bins[i];
+            std::cout << "|";
             if (gigant) {
                 if (bins[i] == mx_count) {
                     for (size_t j = 0; j < 76; j++) {
-                        cout << "*";
+                        std::cout << "*";
                     }
                 }
                 else
                 {
                     for (size_t j = 0; j < (76 * static_cast<double>(bins[i]) / mx_count - 1); j++) {
-                        cout << "*";
+                        std::cout << "*";
                     }
                 }
             }
             else
             {
                 for (size_t j = 0; j < bins[i]; j++) {
-                    cout << "*";
+                    std::cout << "*";
                 }
             }
-            cout << endl;
+            std::cout << std::endl;
         }
     }
 }