code: вывод гистограммы в SVG

LABA1.cpp

@@ -1,9 +1,52 @@
 #include <iostream>
+#include <string>
 #include <vector>
 #include "histogram.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_text(double left, double baseline, string text) {
+    cout << "<text x='" << left << "' y='" << baseline << "'>" << text <<"</text>\n";
+}
+
+void svg_rect(double x, double y, double width, double height, string stroke = "red", string fill = "red") {
+    cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' stroke='" << stroke << "' height='" << height << "' fill='" << fill << "' />\n";
+}
+
+void svg_end() {
+    cout << "</svg>\n";
+}
+
+void show_histogram_svg(const vector<double>& marks, const vector<double>& chart) {
+    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;
+    for (double bin : chart) {
+        const double bin_width = BLOCK_WIDTH * bin;
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string((int)bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}
+
+
 struct Input {
     vector <double> marks;
     int NCharts = 0;
@@ -25,5 +68,6 @@ int main()
 {
     Input in = input_data();
     vector <double> chart = MakeHistogram(in.marks, in.NCharts);
-    show_histogram_text(in.marks, chart);
+    //show_histogram_text(in.marks, chart);
+    show_histogram_svg(in.marks, chart);
 }