diff --git a/LR3.cbp b/LR3.cbp
index f86b34d..3b38ac4 100644
--- a/LR3.cbp
+++ b/LR3.cbp
@@ -32,7 +32,22 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="histogram_internal.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Extensions />
 	</Project>
 </CodeBlocks_project_file>
diff --git a/histogram.cpp b/histogram.cpp
index 5bfcbfd..50d548b 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -1,9 +1,10 @@
 #include "histogram.h"
 #include <vector>
 
-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)
     {
         if (x < min)
diff --git a/main.cpp b/main.cpp
index 4866c09..f2a6303 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,6 +2,7 @@
 #include <vector>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
 
 using namespace std;
 
@@ -32,6 +33,6 @@ int main()
 {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins);
+    show_histogram_svg(bins);
     return 0;
 }
diff --git a/svg.cpp b/svg.cpp
index 3e04594..8357f4c 100644
--- a/svg.cpp
+++ b/svg.cpp
@@ -31,6 +31,7 @@ void show_histogram_svg(const std::vector<double>& bins) {
     const auto TEXT_WIDTH = 50;
     const auto BIN_HEIGHT = 30;
     const auto BLOCK_WIDTH = 10;
+    const std::size_t MAX_STAR = IMAGE_WIDTH - TEXT_WIDTH;
 
     svg_begin(400, 300);
     double top = 0;
@@ -41,5 +42,13 @@ void show_histogram_svg(const std::vector<double>& bins) {
         top += BIN_HEIGHT;
     }
 
+    std::size_t max_star_search=bins[0];
+    for (std::size_t i=0; i < bins.size(); i++){
+        if (max_star_search < bins[i]){
+            max_star_search=bins[i];
+        }
+    }
+
+
     svg_end();
 }
diff --git a/unittest.cpp b/unittest.cpp
index e69de29..4eea04a 100644
--- a/unittest.cpp
+++ b/unittest.cpp
@@ -0,0 +1,22 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1, 2}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+
+TEST_CASE("distinct negative numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+
+