final

.gitignore

@@ -0,0 +1,10 @@
+/bin
+/obj
+/lab01.depend
+/lab01.layout
+/main.exe
+/main.o
+/unittest.depend
+/unittest.layout
+/unittest1.depend
+

histogram.cpp

@@ -5,24 +5,30 @@
 
 using namespace std;
 
-void
+bool
 find_minmax(const vector<double>& numbers, double& min1, double& max1)
 {
+    if (numbers.size() == 0) {
+        return false;
+    }
+    else {
     max1 = numbers[0];
     min1 = numbers[0];
+    }
     for(size_t i = 0; i < numbers.size(); i++)
     {
         if (numbers[i] > max1) max1 = numbers[i];
         if (numbers[i] < min1) min1 = numbers[i];
     }
-    return;
+    return true;
 }
 
 vector<double>
 make_histogram(const vector<double>& numbers, size_t bin_count)
 {
     double min1, max1;
-    find_minmax(numbers, min1, max1);
+    if (!find_minmax(numbers, min1, max1))
+        cout << "error in find_minmax: empty vector";
 
     vector<double> bins;
     bins.resize(bin_count);

histogram_internal.h

@@ -1,5 +1,5 @@
 #pragma once
 #include <vector>
 
-void
+bool
 find_minmax(const std::vector<double>& numbers, double& min1, double& max1);

lab01.cbp

@@ -33,10 +33,18 @@
 			<Add option="-fexceptions" />
 		</Compiler>
 		<Unit filename=".gitignore" />
+		<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>
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>

svg.cpp

@@ -1,6 +1,7 @@
 #include "svg.h"
 #include <iostream>
 #include <vector>
+#include <cmath>
 
 using namespace std;
 
@@ -28,6 +29,13 @@ void svg_rect(double x, double y, double width, double height, string stroke = "
     cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << "' stroke='" << stroke << "' fill='#" << fill << fill << fill << "' />";
 }
 
+void color_find(double bin, int maxb, int& color){
+    color = (10 - (bin * 9) / maxb);
+    if (color < 0) { cout << "cant take color";
+    color = 9;
+    }
+}
+
 void
 show_histogram_svg(const vector<double>& bins) {
 
@@ -43,20 +51,21 @@ show_histogram_svg(const vector<double>& bins) {
 
     double top = 0;
     const size_t MAX_ASTERISK = IMAGE_WIDTH - TEXT_WIDTH;
-    double maxb = bins[0];
+    int maxb = bins[0];
+    int color;
 
     for (size_t j = 1; j < bins.size(); j++)
     {
         if (bins[j] > maxb) maxb = bins[j];
     }
 
-    double maxb1 = maxb * BLOCK_WIDTH;
+    int maxb1 = maxb * BLOCK_WIDTH;
 
     for (size_t bin : bins) {
 
     double bin_width;
 
-    int color = (10 - (bin * 9) / maxb);
+    color_find(bin, maxb, color);
 
         if (maxb1 > MAX_ASTERISK)
         {

svg_internal.h

@@ -0,0 +1,4 @@
+#pragma once
+
+void
+color_find(double bin, int maxb, int& color);

unittest.cbp

@@ -31,6 +31,9 @@
 		<Compiler>
 			<Add option="-Wall" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram_internal.h" />
+		<Unit filename="unittest.cpp" />
 		<Extensions />
 	</Project>
 </CodeBlocks_project_file>

unittest.cpp

@@ -6,9 +6,7 @@
 TEST_CASE("distinct positive numbers") {
     double min = 0;
     double max = 0;
-    find_minmax({1, 2}, min, max);
-    CHECK(min == 1);
-    CHECK(max == 2);
+    CHECK(find_minmax({}, min, max) == false);
 }
 
 TEST_CASE("distinct identical numbers") {

unittest1.cbp

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_project_file>
+	<FileVersion major="1" minor="6" />
+	<Project>
+		<Option title="unittest1" />
+		<Option pch_mode="2" />
+		<Option compiler="gfortran" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin/Debug/unittest1" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Debug/" />
+				<Option type="1" />
+				<Option compiler="gfortran" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin/Release/unittest1" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Release/" />
+				<Option type="1" />
+				<Option compiler="gfortran" />
+				<Compiler>
+					<Add option="-O2" />
+				</Compiler>
+				<Linker>
+					<Add option="-s" />
+				</Linker>
+			</Target>
+		</Build>
+		<Compiler>
+			<Add option="-Wall" />
+		</Compiler>
+		<Extensions>
+			<lib_finder disable_auto="1" />
+		</Extensions>
+	</Project>
+</CodeBlocks_project_file>

unittest1.cpp

@@ -0,0 +1,28 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "svg_internal.h"
+
+TEST_CASE("color standart") {
+    int color = 0;
+    color_find(1, 5, color);
+    CHECK(color == 8);
+}
+
+TEST_CASE("color equal") {
+    int color = 0;
+    color_find(5, 5, color);
+    CHECK(color == 1);
+}
+
+TEST_CASE("color sr") {
+    int color = 0;
+    color_find(3, 5, color);
+    CHECK(color == 4);
+}
+
+TEST_CASE("color nonsr") {
+    int color = 0;
+    color_find(7, 5, color);
+    CHECK(color == 9);
+}