diff --git a/LABA1.cpp b/LABA1.cpp
index 76a75a1..06dc84c 100644
--- a/LABA1.cpp
+++ b/LABA1.cpp
@@ -3,6 +3,7 @@
 #include <vector>
 #include "histogram.h" 
 #include "text.h" 
+
 using namespace std;
 
 
@@ -67,6 +68,7 @@ struct Input {
 
 Input input_data() {
     Input in;
+    Input in2;
     int VecSize = 0;
     cin >> VecSize;
     in.marks.resize(VecSize);
diff --git a/LABA1.sln b/LABA1.sln
index c0717d7..ead127d 100644
--- a/LABA1.sln
+++ b/LABA1.sln
@@ -5,6 +5,8 @@ VisualStudioVersion = 17.7.34031.279
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "LABA1", "LABA1.vcxproj", "{D164F324-4243-431D-90CA-53E6B0D0180A}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "unittest", "unittest.vcxproj", "{A913469C-7807-4128-B5B5-C49C6B34CDE3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x64 = Debug|x64
@@ -21,6 +23,14 @@ Global
 		{D164F324-4243-431D-90CA-53E6B0D0180A}.Release|x64.Build.0 = Release|x64
 		{D164F324-4243-431D-90CA-53E6B0D0180A}.Release|x86.ActiveCfg = Release|Win32
 		{D164F324-4243-431D-90CA-53E6B0D0180A}.Release|x86.Build.0 = Release|Win32
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Debug|x64.ActiveCfg = Debug|x64
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Debug|x64.Build.0 = Debug|x64
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Debug|x86.ActiveCfg = Debug|Win32
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Debug|x86.Build.0 = Debug|Win32
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Release|x64.ActiveCfg = Release|x64
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Release|x64.Build.0 = Release|x64
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Release|x86.ActiveCfg = Release|Win32
+		{A913469C-7807-4128-B5B5-C49C6B34CDE3}.Release|x86.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/LABA1.vcxproj b/LABA1.vcxproj
index 930fdc7..7caaa2e 100644
--- a/LABA1.vcxproj
+++ b/LABA1.vcxproj
@@ -127,7 +127,9 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="histogram.cpp" />
     <ClCompile Include="LABA1.cpp" />
+    <ClCompile Include="text.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
diff --git a/LABA1.vcxproj.filters b/LABA1.vcxproj.filters
index daf0a2f..4390fef 100644
--- a/LABA1.vcxproj.filters
+++ b/LABA1.vcxproj.filters
@@ -18,5 +18,11 @@
     <ClCompile Include="LABA1.cpp">
       <Filter>Исходные файлы</Filter>
     </ClCompile>
+    <ClCompile Include="histogram.cpp">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="text.cpp">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/histogram.cpp b/histogram.cpp
index 38ded28..a4c686b 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -3,18 +3,21 @@ using namespace std;
 
 void FindMinMax(const vector<double>& marks, double& min, double& max) {
     max = 0;
-    min = marks[0];
-    for (double x : marks) {
-        if (x > max) {
-            max = x;
-        }
-        if (x < min) {
-            min = x;
+	min = 0;
+    if (marks.size() = 0) {
+        min = marks[0];
+        for (double x : marks) {
+            if (x > max) {
+                max = x;
+            }
+            if (x < min) {
+                min = x;
+            }
         }
     }
-};
+}
 
-static vector <double> MakeHistogram(const vector<double>& marks, int NCharts) {
+vector <double> MakeHistogram(const vector<double>& marks, int NCharts) {
     double interval = 0, i = 0, min = 0, max = 0;
     vector<double> chart(NCharts);
     FindMinMax(marks, min, max);
@@ -27,4 +30,4 @@ static vector <double> MakeHistogram(const vector<double>& marks, int NCharts) {
         chart[i] += 1;
     }
     return chart;
-};
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/histogram.h b/histogram.h
index 1199262..8d36e6e 100644
--- a/histogram.h
+++ b/histogram.h
@@ -1,8 +1,9 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
-#include "histogram.cpp" //��������, �������. �� ��� ����� �� ��������!
+
 #include <vector>
 
+void FindMinMax(const std::vector<double>& marks, double& min, double& max);
 std::vector<double> MakeHistogram(const std::vector<double>& marks, int NCharts);
 
 #endif // HISTOGRAM_H_INCLUDED
\ No newline at end of file
diff --git a/histogram_internal.h b/histogram_internal.h
index 312b93b..4a2e17e 100644
--- a/histogram_internal.h
+++ b/histogram_internal.h
@@ -1,6 +1,5 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
-#include "histogram.cpp"
 #include <vector>
 
 void FindMinMax(const std::vector<double>& marks, double& min, double& max);
diff --git a/text.cpp b/text.cpp
index 8e7e29c..08012f0 100644
--- a/text.cpp
+++ b/text.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "histogram.h"
 using namespace std;
 
diff --git a/text.h b/text.h
index 77324a7..7ce729d 100644
--- a/text.h
+++ b/text.h
@@ -1,8 +1,8 @@
 #ifndef TEXT_H_INCLUDED
 #define TEXT_H_INCLUDED
-#include "text.cpp" //��������, �������. �� ��� ����� �� ��������!
+
 #include <vector>
 
-void show_histogram_text(const vector<double>& marks, const vector<double>& chart);
+void show_histogram_text(const std::vector<double>& marks, const std::vector<double>& chart);
 
 #endif // TEXT_H_INCLUDED
\ No newline at end of file
diff --git a/unittest.cpp b/unittest.cpp
index 13ed78d..03054ec 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -13,21 +13,13 @@ TEST_CASE("distinct positive numbers") {
     CHECK(max == 2);
 }
 
-/*
-Если вектор пуст, искусственно добавляем в него значения
-Проверяем, равны ли min и max этим искусственным значениям
-*/
+
 TEST_CASE("empty vector") {
     double min = 0;
     double max = 0;
-    vector <double> fortest;
-    if (fortest.size() == 0) {
-        fortest.push_back(90);
-        fortest.push_back(100);
-    }
-    FindMinMax(fortest, min, max);
-    CHECK(min != 90);
-    CHECK(max != 100);
+    FindMinMax({ }, min, max);
+    CHECK(min != 0);
+    CHECK(max != 0);
 }
 
 TEST_CASE("one element") {
diff --git a/unittest.vcxproj b/unittest.vcxproj
index 36c44ba..6245a90 100644
--- a/unittest.vcxproj
+++ b/unittest.vcxproj
@@ -127,6 +127,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClCompile Include="histogram.cpp" />
     <ClCompile Include="unittest.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/unittest.vcxproj.filters b/unittest.vcxproj.filters
index 31017b9..95e7855 100644
--- a/unittest.vcxproj.filters
+++ b/unittest.vcxproj.filters
@@ -18,5 +18,8 @@
     <ClCompile Include="unittest.cpp">
       <Filter>Исходные файлы</Filter>
     </ClCompile>
+    <ClCompile Include="histogram.cpp">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file