финальная версия

svg.cpp

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <iostream>
+#include <vector>
+
+#include "svg.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, string fill){
+     cout << "<rect x=' " << x << "' y=' "<< y <<" ' width=' " << width <<" ' height=' " << height <<
+      " ' stroke=' red' fill=' #ffeeee'/>";
+}
+
+void show_histogram_svg( 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(IMAGE_WIDTH, IMAGE_HEIGHT);
+    double top = 0;
+    const size_t MAX_ASTERISK = IMAGE_WIDTH - TEXT_WIDTH;
+    int maxb = bins[0];
+    for (size_t j = 0; j < bins.size(); j++){
+        if (bins[j] > maxb) maxb = bins[j];
+    }
+    cout <<"                         " << maxb<< "            ";
+
+    for (size_t i = 0; i < bins.size(); i++) {
+            double bin_width;
+            if (maxb == bins[i] ){
+            bin_width = MAX_ASTERISK ;
+            }
+            else {
+               bin_width = MAX_ASTERISK * bins[i] / maxb;
+            }
+               svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bins[i]));
+               svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT,  "blue", "#aaffaa");
+               top += BIN_HEIGHT;
+    }
+    svg_end();
+}