4:unit tests

histogram.cpp

@@ -1,5 +1,5 @@
 #include "histogram.h"
-static void find_minmax(const std::vector<double>& numbers, double& min, double& max) {
+ void find_minmax(const std::vector<double>& numbers, double& min, double& max) {
 	min = numbers[0];
 	max = numbers[0];
 	for (double x : numbers)

histogram_internal.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+void find_minmax(const std::vector<double>& numbers, double& min, double& max);

vector.vcxproj

@@ -133,6 +133,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="histogram.h" />
+    <ClInclude Include="histogram_internal.h" />
     <ClInclude Include="text.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

vector.vcxproj.filters

@@ -32,5 +32,8 @@
     <ClInclude Include="text.h">
       <Filter>Файлы заголовков</Filter>
     </ClInclude>
+    <ClInclude Include="histogram_internal.h">
+      <Filter>Файлы заголовков</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>