code: изменение программы

main.cpp

@@ -1,6 +1,10 @@
 #include <iostream>
 #include <conio.h>
 #include <vector>
+#include "histogram.h"
+#include "text.h"
+#include "svg.h"
+
 using namespace std;
 struct Input {
     vector<double> numbers;
@@ -119,6 +123,6 @@ int main()
     const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, MAX_ASTERISK);
+    show_histogram_svg(bins);
     return 0;
 }

svg.cpp

@@ -0,0 +1,24 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+
+void
+svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' ";
+    cout << "height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void
+svg_end() {
+    cout << "</svg>\n";
+}
+
+void
+show_histogram_svg(const vector <double>& bins) {
+    svg_begin(400, 300);
+    svg_end();
+}

svg.h

@@ -0,0 +1,7 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+
+void
+show_histogram_svg(const std::vector<double>& bins);
+
+#endif // SVG_H_INCLUDED

unittest.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="unittest" />
+		<Option pch_mode="2" />
+		<Option compiler="gcc" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin/Debug/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Debug/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin/Release/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Release/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<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>

unittest.cpp

@@ -0,0 +1,40 @@
+#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("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({NULL}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}
+TEST_CASE("one element") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1}, min, max);
+    CHECK (min == 1);
+    CHECK (max == 1);
+}
+TEST_CASE("negative elements") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK (min == -2);
+    CHECK (max == -1);
+}
+TEST_CASE("same elements") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1, 1, 1}, min, max);
+    CHECK (min == 1);
+    CHECK (max == 1);
+}