diff --git a/lab01/histogram.cpp b/lab01/histogram.cpp
new file mode 100644
index 0000000..2fcff5d
--- /dev/null
+++ b/lab01/histogram.cpp
@@ -0,0 +1,43 @@
+#include "histogram.h"
+#include <vector>
+#include <iostream>
+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;
+        }
+    }
+}
+
+std::vector<double>
+make_histogram(const std::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 (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]++;
+            }
+    }
+    return bins;
+}
diff --git a/lab01/histogram.h b/lab01/histogram.h
new file mode 100644
index 0000000..b7b5a52
--- /dev/null
+++ b/lab01/histogram.h
@@ -0,0 +1,6 @@
+#include <iostream>
+#pragma once
+#include <vector>
+
+std::vector<double>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);
diff --git a/lab01/text.cpp b/lab01/text.cpp
new file mode 100644
index 0000000..5272b36
--- /dev/null
+++ b/lab01/text.cpp
@@ -0,0 +1,25 @@
+#include "text.h"
+#include <string>
+#include <iostream>
+using namespace std;
+
+void
+show_histogram_text (const vector<double>& bins,size_t MAX_ASTERISK, size_t bin_count){
+    double max_count = bins[0];
+    for (double x: bins){
+        if (x > max_count) {
+            max_count = x;
+        }
+    }
+
+    for (int i = 0; i < bin_count; i++){
+        double count = bins[i];
+        size_t height = MAX_ASTERISK * (static_cast<double>(count) / max_count);
+        string line (height , '*');
+        if (bins[i]<100)
+            {cout << ' ';}
+        if (bins[i]<10)
+        {cout << ' ';}
+        cout << bins[i] << "|" << line << endl;
+    }
+}
diff --git a/lab01/text.h b/lab01/text.h
new file mode 100644
index 0000000..3e9061d
--- /dev/null
+++ b/lab01/text.h
@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+#include "text.cpp"
+void
+show_histogram_text (const std::vector<double>& bins,size_t MAX_ASTERISK, size_t bin_count);