diff --git a/histogram.cpp b/histogram.cpp
new file mode 100644
index 0000000..ed245d6
--- /dev/null
+++ b/histogram.cpp
@@ -0,0 +1,45 @@
+#include "histogram.h"
+#include <iostream>
+#include <vector>
+using namespace std;
+static void find_minmax(const vector<double>& numbers, double& minN, double& maxN){
+    minN = numbers[0];
+    maxN = numbers[0];
+    for (double x : numbers){
+        if (x < minN){
+            minN = x;
+        }
+        else if (x > maxN) {
+            maxN = x;
+        }
+    }
+}
+
+vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count){
+    double minN, maxN;
+    find_minmax(numbers, minN, maxN);
+    vector <size_t> bins(bin_count);
+    double diff = (maxN - minN) / bin_count;
+    size_t max_count = 0;
+    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 = minN + j * diff;
+            auto hi = minN + (j + 1) * diff;
+            if ((lo <= numbers[i]) && (hi > numbers[i])){
+                bins[j]++;
+                if (bins[j] > max_count){
+                    max_count = bins[j];
+                }
+                found = true;
+            }
+        }
+        if(!found){
+                bins[bin_count - 1]++;
+                if (bins[bin_count - 1] > max_count){
+                    max_count = bins[bin_count - 1];
+                }
+            }
+    }
+    return bins;
+}
diff --git a/histogram.h b/histogram.h
new file mode 100644
index 0000000..aa151b7
--- /dev/null
+++ b/histogram.h
@@ -0,0 +1,10 @@
+#ifndef HISTOGRAM_H_INCLUDED
+#define HISTOGRAM_H_INCLUDED
+
+#include <vector>
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);
+
+
+
+#endif // HISTOGRAM_H_INCLUDED
diff --git a/main.cpp b/main.cpp
index a51cad9..d980c06 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,7 @@
 #include <iostream>
 #include <vector>
+#include "histogram.h"
+#include "text.h"
 using namespace std;
 
 struct Input{
@@ -22,83 +24,6 @@ input_data()
     return in;
 }
 
-void find_minmax(const vector<double>& numbers, double& minN, double& maxN){
-    minN = numbers[0];
-    maxN = numbers[0];
-    for (double x : numbers){
-        if (x < minN){
-            minN = x;
-        }
-        else if (x > maxN) {
-            maxN = x;
-        }
-    }
-}
-
-vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count){
-    double minN, maxN;
-    find_minmax(numbers, minN, maxN);
-    vector <size_t> bins(bin_count);
-    double diff = (maxN - minN) / bin_count;
-    size_t max_count = 0;
-    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 = minN + j * diff;
-            auto hi = minN + (j + 1) * diff;
-            if ((lo <= numbers[i]) && (hi > numbers[i])){
-                bins[j]++;
-                if (bins[j] > max_count){
-                    max_count = bins[j];
-                }
-                found = true;
-            }
-        }
-        if(!found){
-                bins[bin_count - 1]++;
-                if (bins[bin_count - 1] > max_count){
-                    max_count = bins[bin_count - 1];
-                }
-            }
-    }
-    return bins;
-}
-
-void show_histogram_text(const vector <size_t>& bins,size_t bin_count, size_t max_count){
-    const size_t SCREEN_WIDTH = 80;
-    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-    bool scaling = false;
-    if (max_count > MAX_ASTERISK){
-        scaling = true;
-    }
-    for (size_t i = 0; i < bin_count; i++){
-        if (bins[i] < 10){
-            cout << "  ";
-        }
-        else if (bins[i] < 100){
-            cout << " ";
-        }
-        else{
-            cout << "";
-        }
-        cout << bins[i] << '|';
-        size_t number_of_stars = bins[i];
-        if (scaling){
-            if (bins[i] == max_count){
-                    number_of_stars = MAX_ASTERISK * 1.0;
-            }
-            else{
-                number_of_stars = MAX_ASTERISK * (static_cast<double>(bins[i]) / max_count);
-            }
-        }
-
-        for (size_t j = 0; j < number_of_stars; j++){
-            cout << '*';
-        }
-        cout << endl;
-    }
-}
-
 int main()
 {
     size_t max_count;
diff --git a/text.cpp b/text.cpp
new file mode 100644
index 0000000..75ccda5
--- /dev/null
+++ b/text.cpp
@@ -0,0 +1,38 @@
+#include "text.h"
+#include <iostream>
+#include <vector>
+using namespace std;
+void show_histogram_text(const vector <size_t>& bins,size_t bin_count, size_t max_count){
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    bool scaling = false;
+    if (max_count > MAX_ASTERISK){
+        scaling = true;
+    }
+    for (size_t i = 0; i < bin_count; i++){
+        if (bins[i] < 10){
+            cout << "  ";
+        }
+        else if (bins[i] < 100){
+            cout << " ";
+        }
+        else{
+            cout << "";
+        }
+        cout << bins[i] << '|';
+        size_t number_of_stars = bins[i];
+        if (scaling){
+            if (bins[i] == max_count){
+                    number_of_stars = MAX_ASTERISK * 1.0;
+            }
+            else{
+                number_of_stars = MAX_ASTERISK * (static_cast<double>(bins[i]) / max_count);
+            }
+        }
+
+        for (size_t j = 0; j < number_of_stars; j++){
+            cout << '*';
+        }
+        cout << endl;
+    }
+}
diff --git a/text.h b/text.h
new file mode 100644
index 0000000..715718b
--- /dev/null
+++ b/text.h
@@ -0,0 +1,7 @@
+#ifndef TEXT_H_INCLUDED
+#define TEXT_H_INCLUDED
+
+#include <vector>
+void show_histogram_text(const std::vector <size_t>& bins,size_t bin_count, size_t max_count);
+
+#endif // TEXT_H_INCLUDED