diff --git a/histogram.cpp b/histogram.cpp
new file mode 100644
index 0000000..f66701b
--- /dev/null
+++ b/histogram.cpp
@@ -0,0 +1,44 @@
+#include "histogram.h"
+
+using namespace std;
+
+static 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>
+make_histogram(const vector<double>& numbers, size_t bin_count){
+    size_t number_count = numbers.size();
+    vector<size_t> bins(bin_count);
+    double min, max;
+    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;
+            }
+        }
+        if (!found) {
+            bins[bin_count - 1]++;
+        }
+    }
+    return bins;
+}
diff --git a/histogram.h b/histogram.h
new file mode 100644
index 0000000..a86c9a3
--- /dev/null
+++ b/histogram.h
@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);
diff --git a/lab01.cbp b/lab01.cbp
index fb64a0d..81cae27 100644
--- a/lab01.cbp
+++ b/lab01.cbp
@@ -33,6 +33,10 @@
 			<Add option="-fexceptions" />
 		</Compiler>
 		<Unit filename=".gitignore" />
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Unit filename="main.cpp" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
diff --git a/main.cpp b/main.cpp
index 92b7230..1ecb83b 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,8 @@
 #include <iostream>
 #include <vector>
+#include "histogram.h"
+#include "text.h"
+
 using namespace std;
 
 struct Input {
@@ -23,97 +26,6 @@ input_data() {
     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>
-make_histogram(const vector<double>& numbers, size_t bin_count){
-    size_t number_count = numbers.size();
-    vector<size_t> bins(bin_count);
-    double min, max;
-    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;
-            }
-        }
-        if (!found) {
-            bins[bin_count - 1]++;
-        }
-    }
-    return bins;
-}
-
-void
-show_histogram_text(const vector<size_t>& bins){
-    const size_t SCREEN_WIDTH = 80;
-    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-
-    auto bin_count = bins.size();
-
-    size_t max_count = 0;
-    for (size_t i = 0; i < bin_count; i++){
-        size_t Count = bins[i];
-        if (max_count < Count){
-            max_count = Count;
-        }
-    }
-    if (max_count <= MAX_ASTERISK){
-        for (size_t i = 0; i < bin_count; i++){
-            size_t Count = bins[i];
-            if (Count < 100){
-                cout << " ";
-            }
-            if (Count < 10){
-                cout << " ";
-            }
-            cout << Count << "|";
-            for (size_t j = 0; j < Count; j++){
-                cout << "*";
-            }
-            cout << "\n";
-        }
-    }
-    else{
-        for (size_t i = 0; i < bin_count; i++){
-            size_t Count = bins[i];
-            size_t height = 76 * (static_cast<double>(Count) / max_count);
-            if (Count < 100){
-                cout << " ";
-            }
-            if (Count < 10){
-                cout << " ";
-            }
-            cout << Count << "|";
-            for (size_t j = 0; j < height; j++){
-                cout << "*";
-            }
-            cout << "\n";
-        }
-    }
-}
-
-
 int
 main() {
     auto in = input_data();
diff --git a/text.cpp b/text.cpp
new file mode 100644
index 0000000..76b4785
--- /dev/null
+++ b/text.cpp
@@ -0,0 +1,53 @@
+#include "text.h"
+#include <iostream>
+
+using namespace std;
+
+void
+show_histogram_text(const vector<size_t>& bins){
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+
+    auto bin_count = bins.size();
+
+    size_t max_count = 0;
+    for (size_t i = 0; i < bin_count; i++){
+        size_t Count = bins[i];
+        if (max_count < Count){
+            max_count = Count;
+        }
+    }
+    if (max_count <= MAX_ASTERISK){
+        for (size_t i = 0; i < bin_count; i++){
+            size_t Count = bins[i];
+            if (Count < 100){
+                cout << " ";
+            }
+            if (Count < 10){
+                cout << " ";
+            }
+            cout << Count << "|";
+            for (size_t j = 0; j < Count; j++){
+                cout << "*";
+            }
+            cout << "\n";
+        }
+    }
+    else{
+        for (size_t i = 0; i < bin_count; i++){
+            size_t Count = bins[i];
+            size_t height = 76 * (static_cast<double>(Count) / max_count);
+            if (Count < 100){
+                cout << " ";
+            }
+            if (Count < 10){
+                cout << " ";
+            }
+            cout << Count << "|";
+            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..7906f83
--- /dev/null
+++ b/text.h
@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+void
+show_histogram_text(const std::vector<size_t>& bins);