code: добавлена функция вывода гистограммы в формате SVG

histogram.cpp

@@ -3,7 +3,7 @@
 
 using namespace std;
 
-static void find_minmax(const vector<double>& numbers, double& minimum, double& maximum) {
+void find_minmax(const vector<double>& numbers, double& minimum, double& maximum) {
     minimum = numbers[0];
     maximum = numbers[0];
     for (auto i : numbers) {

main.cpp

@@ -3,7 +3,7 @@
 #include <string>
 #include "histogram.hpp"
 #include "text.hpp"
-
+#include "svg.hpp"
 using namespace std;
 
 struct Input {
@@ -29,61 +29,9 @@ Input input_data() {
     return in;
 }
 
-//void find_minmax(const vector<double>& numbers, double& minimum, double& maximum) {
-//    minimum = numbers[0];
-//    for (int i : numbers) {
-//        if (i < minimum) minimum = i;
-//    }
-//    maximum = numbers[0];
-//    for (int i : numbers) {
-//        if (i > maximum) maximum = i;
-//    }
-//}
-
-//vector<size_t> make_histogram(const vector<double>& numbers, size_t& bin_count) {
-//    vector <size_t> baskets;
-//    baskets.resize(bin_count);
-//    
-//    double basket_max;
-//    double basket_min;
-//    double basket_size;
-//    
-//    find_minmax(numbers, basket_min, basket_max);
-//    basket_size = (basket_max - basket_min) / bin_count;
-//    for (int i = 0; i < bin_count; i++) {
-//        for (int j = 0; j < numbers.size(); j++) {
-//            if ((numbers[j] >= (basket_min + i * basket_size) and numbers[j] < (basket_min + (i + 1) * basket_size)) or (i == bin_count - 1 and numbers[j] == basket_max)) {
-//                baskets[i]++;
-//            }
-//        }
-//    }
-//    return baskets;
-//}
-
-//void show_histogram_text(const vector<size_t>& baskets) {
-//    const size_t screen_width = 80;
-//    const size_t max_asterisk = screen_width - 3 - 1;
-//    cout.precision(4);
-//    size_t baskets_max_count;
-//    
-//    baskets_max_count = baskets[0];
-//    for (size_t i : baskets) {
-//        if (i > baskets_max_count) baskets_max_count = i;
-//    }
-//    for (int i = 0; i < baskets.size(); i++) {
-//        size_t height = baskets[i];
-//        if (baskets_max_count > max_asterisk) {
-//            height = max_asterisk * (static_cast<double>(baskets[i]) / baskets_max_count);
-//        }
-//        cout << baskets[i] << "|";
-//        for (int j = 0; j < height; j++) cout << "*";
-//        cout << endl;
-//    }
-//}
-
 int main () {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins);
+    show_histogram_svg(bins);
     return 0;
 }

svg.cpp

@@ -0,0 +1,47 @@
+#include "svg.hpp"
+#include <iostream>
+#include <vector>
+
+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 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;
+    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();
+}
+
+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='" << stroke << "' fill='" << fill << "'/>";
+}
+

svg.hpp

@@ -0,0 +1,12 @@
+#ifndef svg_hpp
+#define svg_hpp
+#include <vector>
+#include <string>
+
+void svg_begin(double width, double height);
+void svg_end();
+void svg_text(double left, double baseline, std::string text);
+void show_histogram_svg(const std::vector<size_t>& bins);
+void svg_rect(double x, double y, double width, double height, std::string stroke = "black", std::string fill = "black");
+
+#endif /* svg_hpp */