code: Гистограмма в формате svg

histogram.cpp

@@ -5,7 +5,7 @@
 using namespace std;
 
 void find_minmax(const vector<double>& numbers, double& min, double& max) {
-    if (numbers.size() == 2)
+    if (numbers.size() != 0)
     {
         min = numbers[0];
         max = numbers[0];

lab03.vcxproj

@@ -21,12 +21,15 @@
   <ItemGroup>
     <ClCompile Include="histogram.cpp" />
     <ClCompile Include="lab1.cpp" />
+    <ClCompile Include="svg.cpp" />
     <ClCompile Include="text.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="histogram.h">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</ExcludedFromBuild>
     </ClInclude>
+    <ClInclude Include="histogram_internal.h" />
+    <ClInclude Include="svg.h" />
     <ClInclude Include="text.h" />
   </ItemGroup>
   <PropertyGroup Label="Globals">

lab1.cpp

@@ -3,6 +3,7 @@
 #include <vector>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
 using namespace std;
 struct Input {
     vector<double> numbers;
@@ -27,6 +28,6 @@ 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 +1,49 @@
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "svg.h"
+#include "text.h"
+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 svg_text(double left, double baseline, string text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+void svg_rect(double x, double y, double width, double height, string stroke = "black", string fill = "black") {
+    cout << "<rect x = '" << x << "' y = '" << y << "' width = '" << width << "' height = '" << height << "' stroke = '" << stroke << "' fill = '" << fill << "' />";
+}
+
+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;
+    const auto BLOCK_WIDTH = 10;
+    svg_begin(400, 300);
+    double top = 0;
+    size_t max_bin_capacity{};
+    find_max_capacity(bins, max_bin_capacity);
+    for (size_t bin : bins) {
+        const double bin_width = (IMAGE_WIDTH - TEXT_WIDTH) * (static_cast<double>(bin) / max_bin_capacity);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "purple", "#ffcc00");
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}

svg.h

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

text.cpp

@@ -4,7 +4,7 @@
 #include "text.h"
 using namespace std;
 
-static void find_max_capacity(const vector<size_t>& bins, size_t& max_bin_capacity)
+void find_max_capacity(const vector<size_t>& bins, size_t& max_bin_capacity)
 {
     max_bin_capacity = bins[0];
     for (size_t x : bins)

text.h

@@ -2,3 +2,4 @@
 #include <vector>
 
 void show_histogram_text(const std::vector<size_t>& bins, std::size_t max_asterisk);
+void find_max_capacity(const std::vector<size_t>& bins, std::size_t& max_bin_capacity);