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histogram.cpp

@@ -1,4 +1,5 @@
 #include "histogram.h"
+#include "svg.h"
 using namespace std;
 
 //  Ïîèñê ìàêñèìóìà è ìèíèìóìà ñðåäè îöåíîê.
@@ -52,3 +53,38 @@ vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count)
         }
     return bins;
 }
+
+//  Ñîçäàíèå ãèñòîãðàììû íà îñíîâàíèè êîðçèí â ôîðìàòå SVG.
+
+void show_histogram_svg(const vector<size_t>& bins)
+{
+//  Íåîáõîäèìûå êîíñòàíòû.
+    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_bins = bins[0];
+
+//  Ïîèñê ìàêñèìàëüíîé êîðçèíû.
+
+    for (size_t x: bins)
+        if (x > max_bins)
+            max_bins = x;
+
+//  Âûðàâíèâàíèå ãèñòîãðàììû ïî ìàêñèìàëüíîìó ñòîëáöó.
+
+    const auto BLOCK_WIDTH = (IMAGE_WIDTH - TEXT_WIDTH)/max_bins;//BLOCK_WIDTH = 10
+
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+    double top = 0;
+    for (size_t bin : bins)
+        {
+            const 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);
+            top += BIN_HEIGHT;
+        }
+    svg_end();
+}

histogram.h

@@ -1,10 +1,16 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
 
+#include <string>
 #include <vector>
 
+//  Создание корзин для оценок.
+
 std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count);
 
+//  Создание гистограммы на основании корзин в формате SVG.
+
+void show_histogram_svg(const std::vector<size_t>& bins);
 
 
 #endif // HISTOGRAM_H_INCLUDED

histogram_internal.h

@@ -3,6 +3,8 @@
 
 #include <vector>
 
+//  Поиск максимального и минимального среди оценок.
+
 void find_minmax(const std::vector<double>& numbers, double& min, double& max);
 
 #endif // HISTOGRAM_INTERNAL_H_INCLUDED

lab01.cbp

@@ -37,6 +37,8 @@
 		<Unit filename="histogram.h" />
 		<Unit filename="histogram_internal.h" />
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h" />
 		<Unit filename="text.cpp" />
 		<Unit filename="text.h" />
 		<Extensions>

main.cpp

@@ -2,6 +2,7 @@
 #include <vector>
 #include "histogram.h"
 #include "text.h"
+
 using namespace std;
 
 //  Ñòðóêòóðà
@@ -34,6 +35,6 @@ int main()
 {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, in.bin_count);
+    show_histogram_svg(bins);
     return 0;
 }

svg.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include "svg.h"
+using namespace std;
+
+//  Ôóíêöèÿ çàãîëîâêà.
+
+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";
+}
+
+//  Ôóíêöèÿ îêîí÷àíèÿ.
+
+void svg_end()
+{
+    cout << "</svg>\n";
+}
+
+//  Ôóíêöèÿ âûâîäà ñòðîêè.
+
+void svg_text(double left, double baseline, string text)
+{
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text << "</text>";
+}
+
+//  Ôóíêöèÿ âûâîäà ïðÿìîóãîëüíèêà.
+
+void svg_rect(double x, double y, double width, double height, string stroke, string fill)
+{
+    cout << "<rect x='" << x << "' y='" << y << "' width='" << width;
+    cout << "' height='" << height << "' stroke='" << stroke << "' fill='" << fill << "'/>";
+}

svg.h

@@ -0,0 +1,23 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+#include <iostream>
+#include <string>
+#include <vector>
+
+//  Ôóíêöèÿ çàãîëîâêà.
+
+void svg_begin(double width, double height);
+
+//  Ôóíêöèÿ îêîí÷àíèÿ.
+
+void svg_end();
+
+//  Ôóíêöèÿ âûâîäà ñòðîêè.
+
+void svg_text(double left, double baseline, std::string text);
+
+//  Ôóíêöèÿ âûâîäà ïðÿìîóãîëüíèêà.
+
+void svg_rect(double x, double y, double width, double height, std::string stroke = "black", std::string fill = "green");//Öâåòà çàäàíû ïî óìîë÷àíèþ.
+
+#endif // SVG_H_INCLUDED

text.cpp

@@ -1,6 +1,8 @@
 #include "text.h"
 using namespace std;
 
+//  Создание гистограммы в текстовом формате.
+
 void show_histogram_text(vector<size_t>& bins, size_t bin_count)
 {
     const size_t SCREEN_WIDTH = 80;

text.h

@@ -3,6 +3,8 @@
 #include <iostream>
 #include <vector>
 
+//  Создание гистограммы в текстовом формате.
+
 void show_histogram_text(std::vector<size_t>& bins, size_t bin_count);
 
 #endif // TEXT_H_INCLUDED

unittest.cpp

@@ -14,7 +14,7 @@ TEST_CASE("distinct positive numbers")
     CHECK(max == 2);
 }
 
-//  Пустой вектор
+//  пустой вектор
 
 TEST_CASE("null vector")
 {