Code: добавлен вывод гистограммы в svg

Lab34.cbp

@@ -32,7 +32,13 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h" />
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h" />
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>

main.cpp

@@ -1,7 +1,7 @@
 #include <iostream>
 #include <vector>
 #include "histogram.h"
-#include "text.h"
+#include "svg.h"
 
 using namespace std;
 
@@ -32,6 +32,6 @@ 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 +1,61 @@
+#include "svg.h"
+#include <vector>
+#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 << "' ";
+    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 = "orange"){
+    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(IMAGE_WIDTH, IMAGE_HEIGHT);
+    double top = 0;
+    double maxbin = bins[0];
+    for (size_t bin : bins) {
+        if (maxbin < bin){
+            maxbin = bin;
+        }
+    }
+    for (size_t bin : bins) {
+        double bin_width = BLOCK_WIDTH * bin;
+        if ((IMAGE_WIDTH - TEXT_WIDTH) < (bin * BLOCK_WIDTH)){
+            bin_width = (IMAGE_WIDTH - TEXT_WIDTH) * ( bin / maxbin );
+        }
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}

svg.h

@@ -0,0 +1,5 @@
+#pragma once
+#include <vector>
+
+void
+show_histogram_svg(const std::vector<size_t>& bins);