гистограмма изображ

svg.cpp

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+#include "svg.h"
+#include <string>
+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_count = 0;
+    for (auto bin : bins)
+    {
+        if (bin > max_count)
+            max_count = bin;
+    }
+
+for (size_t bin : bins)
+    {
+        const double bin_width = BLOCK_WIDTH * bin;
+        if(bin_width> IMAGE_WIDTH){
+        const double bin_width= IMAGE_WIDTH - TEXT_WIDTH;
+        }
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "blue", "green");
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}