diff --git a/histogram.cpp b/histogram.cpp
new file mode 100644
index 0000000..fcc43ed
--- /dev/null
+++ b/histogram.cpp
@@ -0,0 +1,46 @@
+#include <vector>
+#include "histogram.h"
+using namespace std;
+
+void find_minmax(const vector<double> &numbers, double &min, double &max)
+{
+    min = numbers[0];
+    max = numbers[0];
+    for (auto el : numbers)
+    {
+        if (el > max)
+        {
+            max = el;
+        }
+        if (el < min)
+        {
+            min = el;
+        }
+    }
+}
+
+vector<size_t> make_histogram(const vector<double> &numbers, const size_t bin_count){
+        vector<size_t> bins(bin_count);
+        double max, min;
+        find_minmax(numbers, min, max);
+        double binSize = (max - min) / bin_count;
+        for (size_t i = 0; i < numbers.size(); i++)
+        {
+            bool found = false;
+            for (size_t j = 0; (j < bin_count - 1) && !found; j++)
+            {
+                auto lo = min + j * binSize;
+                auto hi = min + (j + 1) * binSize;
+                if ((lo <= numbers[i]) && (numbers[i] < hi))
+                {
+                    bins[j]++;
+                    found = true;
+                }
+            }
+            if (!found)
+            {
+                bins[bin_count - 1]++;
+            }
+        }
+        return bins;
+    }
diff --git a/histogram.h b/histogram.h
new file mode 100644
index 0000000..1991ac2
--- /dev/null
+++ b/histogram.h
@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count);
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 59d0486..bf8dd20 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,11 +1,10 @@
 #include <iostream>
+#include "histogram.h"
+#include "text.h"
 #include <vector>
 
 using namespace std;
 
-const size_t SCREEN_WIDTH = 80;
-const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-
 struct Input
 {
     vector<double> numbers;
@@ -26,74 +25,6 @@ Input input_data()
     return in;
 }
 
-void find_minmax(const vector<double> &numbers, double &min, double &max)
-{
-    min = numbers[0];
-    max = numbers[0];
-    for (auto el : numbers)
-    {
-        if (el > max)
-        {
-            max = el;
-        }
-        if (el < min)
-        {
-            min = el;
-        }
-    }
-}
-
-vector<size_t> make_histogram(const vector<double> &numbers, const size_t &bin_count){
-        vector<size_t> bins(bin_count);
-        double max, min;
-        find_minmax(numbers, min, max);
-        double binSize = (max - min) / bin_count;
-        for (size_t i = 0; i < numbers.size(); i++)
-        {
-            bool found = false;
-            for (size_t j = 0; (j < bin_count - 1) && !found; j++)
-            {
-                auto lo = min + j * binSize;
-                auto hi = min + (j + 1) * binSize;
-                if ((lo <= numbers[i]) && (numbers[i] < hi))
-                {
-                    bins[j]++;
-                    found = true;
-                }
-            }
-            if (!found)
-            {
-                bins[bin_count - 1]++;
-            }
-        }
-        return bins;
-    }
-
-void show_histogram_text(const vector<size_t> &bins){
-        size_t maxCount = bins[0];
-        for (auto bin : bins)
-        {
-            if (maxCount < bin)
-            {
-                maxCount = bin;
-            }
-        }
-        for (auto bin : bins)
-        {
-            if (bin < 100)
-            {
-                cout << " ";
-            }
-            if (bin < 10)
-            {
-                cout << " ";
-            }
-            size_t height = maxCount < MAX_ASTERISK ? bin : MAX_ASTERISK * (static_cast<double>(bin) / maxCount);
-            cout << bin << "|" << string(height, '*');
-            cout << "\n";
-        }
-    }
-
 int main() {
     Input in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
diff --git a/text.cpp b/text.cpp
new file mode 100644
index 0000000..79cee0b
--- /dev/null
+++ b/text.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <vector>
+#include "text.h"
+using namespace std;
+
+const size_t SCREEN_WIDTH = 80;
+const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+
+void show_histogram_text(const vector<size_t> &bins)
+{
+    size_t maxCount = bins[0];
+    for (auto bin : bins)
+    {
+        if (maxCount < bin)
+        {
+            maxCount = bin;
+        }
+    }
+    for (auto bin : bins)
+    {
+        if (bin < 100)
+        {
+            cout << " ";
+        }
+        if (bin < 10)
+        {
+            cout << " ";
+        }
+        size_t height = maxCount < MAX_ASTERISK ? bin : MAX_ASTERISK * (static_cast<double>(bin) / maxCount);
+        cout << bin << "|";
+        for (size_t j = 0; j < height; j++)
+        {
+            cout << "*";
+        }
+        cout << "\n";
+    }
+}
diff --git a/text.h b/text.h
new file mode 100644
index 0000000..441c0f6
--- /dev/null
+++ b/text.h
@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+void show_histogram_text(const std::vector<size_t> &bins);
\ No newline at end of file