.gitignore

@@ -0,0 +1,4 @@
+bin/
+obj/
+*.exe
+*.svg

cs-lab34.cbp

@@ -2,12 +2,12 @@
 <CodeBlocks_project_file>
 	<FileVersion major="1" minor="6" />
 	<Project>
-		<Option title="lab01" />
+		<Option title="cs-lab34" />
 		<Option pch_mode="2" />
 		<Option compiler="gcc" />
 		<Build>
 			<Target title="Debug">
-				<Option output="bin/Debug/lab01" prefix_auto="1" extension_auto="1" />
+				<Option output="bin/Debug/cs-lab34" prefix_auto="1" extension_auto="1" />
 				<Option object_output="obj/Debug/" />
 				<Option type="1" />
 				<Option compiler="gcc" />
@@ -16,7 +16,7 @@
 				</Compiler>
 			</Target>
 			<Target title="Release">
-				<Option output="bin/Release/lab01" prefix_auto="1" extension_auto="1" />
+				<Option output="bin/Release/cs-lab34" prefix_auto="1" extension_auto="1" />
 				<Option object_output="obj/Release/" />
 				<Option type="1" />
 				<Option compiler="gcc" />
@@ -33,8 +33,6 @@
 			<Add option="-fexceptions" />
 		</Compiler>
 		<Unit filename="main.cpp" />
-		<Extensions>
-			<lib_finder disable_auto="1" />
-		</Extensions>
+		<Extensions />
 	</Project>
 </CodeBlocks_project_file>

cs-lab34.depend

@@ -0,0 +1,81 @@
+# depslib dependency file v1.0
+1745823834 source:c:\users\diman3000\desktop\cs-lab34\histogram.cpp
+	"histogram.h"
+	<vector>
+
+1745823794 c:\users\diman3000\desktop\cs-lab34\histogram.h
+	<vector>
+
+1745823869 source:c:\users\diman3000\desktop\cs-lab34\text.cpp
+	"text.h"
+	<iostream>
+
+1745823848 c:\users\diman3000\desktop\cs-lab34\text.h
+	<vector>
+
+1745824901 source:c:\users\diman3000\desktop\cs-lab34\main.cpp
+	<iostream>
+	<vector>
+	"histogram.h"
+	"svg.h"
+
+1745824381 c:\users\diman3000\desktop\cs-lab34\svg.h
+	<vector>
+	<string>
+
+1745824404 source:c:\users\diman3000\desktop\cs-lab34\svg.cpp
+	"svg.h"
+	<iostream>
+
+1745825391 source:c:\users\diman3000\desktop\cs-lab34\unittest.cpp
+	"doctest.h"
+	"histogram_internal.h"
+
+1745825250 c:\users\diman3000\desktop\cs-lab34\doctest.h
+	<signal.h>
+	<ciso646>
+	<cstddef>
+	<ostream>
+	<istream>
+	<type_traits>
+	"doctest_fwd.h"
+	<ctime>
+	<cmath>
+	<climits>
+	<math.h>
+	<new>
+	<cstdio>
+	<cstdlib>
+	<cstring>
+	<limits>
+	<utility>
+	<fstream>
+	<sstream>
+	<iostream>
+	<algorithm>
+	<iomanip>
+	<vector>
+	<atomic>
+	<mutex>
+	<set>
+	<map>
+	<unordered_set>
+	<exception>
+	<stdexcept>
+	<csignal>
+	<cfloat>
+	<cctype>
+	<cstdint>
+	<string>
+	<sys/types.h>
+	<unistd.h>
+	<sys/sysctl.h>
+	<AfxWin.h>
+	<windows.h>
+	<io.h>
+	<sys/time.h>
+	<unistd.h>
+
+1745825157 c:\users\diman3000\desktop\cs-lab34\histogram_internal.h
+	<vector>
+

cs-lab34.layout

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_layout_file>
+	<FileVersion major="1" minor="0" />
+	<ActiveTarget name="Debug" />
+	<File name="main.cpp" open="1" top="1" tabpos="1" split="0" active="1" splitpos="0" zoom_1="0" zoom_2="0">
+		<Cursor>
+			<Cursor1 position="757" topLine="16" />
+		</Cursor>
+	</File>
+</CodeBlocks_layout_file>

histogram.cpp

@@ -0,0 +1,34 @@
+#include "histogram.h"
+#include <vector>
+
+using namespace std;
+
+void find_minmax(const vector<double>& numbers, double& min, double& max) {
+    min = numbers[0];
+    max = numbers[0];
+    for (float x : numbers) {
+        if (x < min) min = x;
+        else if (x > max) max = x;
+    }
+}
+
+vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count) {
+    double min, max;
+    find_minmax(numbers, min, max);
+
+    float k = (max - min) / bin_count;
+    vector<size_t> bins(bin_count, 0);
+
+    for (double number : numbers) {
+        bool flag = false;
+        for (size_t j = 0; (j < bin_count && !flag); j++) {
+            if (number >= (min + k * j) && number < (min + k * (j + 1))) {
+                bins[j]++;
+                flag = true;
+            }
+        }
+        if (!flag) bins[bin_count - 1]++;
+    }
+
+    return bins;
+}

histogram.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count);

histogram_internal.h

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

main.cpp

@@ -1,77 +1,35 @@
 #include <iostream>
 #include <vector>
-#include <limits>
-
+#include "histogram.h"
+#include "text.h"
+#include "svg.h"
 using namespace std;
 
 struct Input {
     vector<double> numbers;
-    size_t bin_count{};
+    size_t bin_count;
 };
 
 Input input_data() {
+    Input in;
     size_t number_count;
+    cerr << "Enter number count: ";
     cin >> number_count;
 
-    Input in;
     in.numbers.resize(number_count);
-
+    cerr << "Enter numbers: ";
     for (size_t i = 0; i < number_count; i++) {
         cin >> in.numbers[i];
     }
 
+    cerr << "Enter bin count: ";
     cin >> in.bin_count;
-
     return in;
 }
 
-void find_minmax(const vector<double>& numbers, double& min, double& max) {
-    if (numbers.empty()) return;
-
-    min = max = numbers[0];
-
-    for (const double& number : numbers) {
-        if (number < min) {
-            min = number;
-        }
-        if (number > max) {
-            max = number;
-        }
-    }
-}
-
-vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count) {
-    double min, max;
-    find_minmax(numbers, min, max);
-
-    vector<size_t> bins(bin_count, 0);
-    double bin_width = (max - min) / bin_count;
-
-    for (const double& number : numbers) {
-        if (number == max) {
-            bins[bin_count - 1]++;
-        } else {
-            size_t bin_index = static_cast<size_t>((number - min) / bin_width);
-            if (bin_index >= bin_count) {
-                bin_index = bin_count - 1;
-            }
-            bins[bin_index]++;
-        }
-    }
-
-    return bins;
-}
-
-void show_histogram_text(const vector<size_t>& bins) {
-    for (size_t i = 0; i < bins.size(); i++) {
-        cout << "Bin " << i << ": " << bins[i] << endl;
-    }
-}
-
 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;
 }

svg.cpp

@@ -0,0 +1,58 @@
+#include "svg.h"
+#include <iostream>
+
+using namespace std;
+
+void svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg ";
+    cout << "width='" << width << "' height='" << height << "' ";
+    cout << "viewBox='0 0 " << width << " " << height << "' ";
+    cout << "xmlns='http://www.w3.org/2000/svg'>\n";
+}
+
+void svg_end() {
+    cout << "</svg>\n";
+}
+
+void svg_text(double left, double baseline, const string& text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>\n";
+}
+
+void svg_rect(double x, double y, double width, double height,
+              const string& stroke, const string& fill) {
+    cout << "<rect x='" << x << "' y='" << y << "' width='" << width
+         << "' height='" << height
+         << "' stroke='" << stroke
+         << "' fill='" << fill << "' />\n";
+}
+
+void show_histogram_svg(const vector<size_t>& bins) {
+    const auto IMAGE_WIDTH = 400;
+    const auto IMAGE_HEIGHT = 300;
+    const auto TEXT_LEFT = 20;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+
+    size_t max_count = 0;
+    for (size_t count : bins) {
+        if (count > max_count) {
+            max_count = count;
+        }
+    }
+
+    double BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH) / static_cast<double>(max_count);
+
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+
+    double top = 0;
+    for (size_t bin : bins) {
+        double bin_width = BLOCK_WIDTH * bin;
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "#aaaaff");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}

svg.h

@@ -0,0 +1,11 @@
+#pragma once
+#include <vector>
+#include <string>
+
+void svg_begin(double width, double height);
+void svg_end();
+void svg_text(double left, double baseline, const std::string& text);
+void svg_rect(double x, double y, double width, double height,
+              const std::string& stroke = "black",
+              const std::string& fill = "black");
+void show_histogram_svg(const std::vector<size_t>& bins);

text.cpp

@@ -0,0 +1,33 @@
+#include "text.h"
+#include <iostream>
+
+using namespace std;
+
+void show_histogram_text(const vector<size_t>& bins) {
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+
+    size_t max_count = 0;
+    for (size_t count : bins) {
+        if (count > max_count) {
+            max_count = count;
+        }
+    }
+
+    for (size_t bin : bins) {
+        if (bin < 100) cout << " ";
+        if (bin < 10) cout << " ";
+        cout << bin << "|";
+
+        size_t height = bin;
+        if (max_count > MAX_ASTERISK) {
+            if (max_count != bin)
+                height = MAX_ASTERISK * (static_cast<float>(bin) / max_count);
+            else
+                height = MAX_ASTERISK;
+        }
+
+        for (size_t i = 0; i < height; i++) cout << "*";
+        cout << "\n";
+    }
+}

text.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+void show_histogram_text(const std::vector<size_t>& bins);

unittest.cpp

@@ -0,0 +1,43 @@
+#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("all numbers are same") {
+    double min = 0;
+    double max = 0;
+    find_minmax({5, 5, 5, 5}, min, max);
+    CHECK(min == 5);
+    CHECK(max == 5);
+}
+
+TEST_CASE("with negative numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-3, -7, -1}, min, max);
+    CHECK(min == -7);
+    CHECK(max == -1);
+}
+
+TEST_CASE("single number") {
+    double min = 0;
+    double max = 0;
+    find_minmax({42}, min, max);
+    CHECK(min == 42);
+    CHECK(max == 42);
+}
+
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}