code: выполнение своего варианта

histogram.cpp

@@ -3,6 +3,11 @@
 
 void find_minmax(const std::vector<double>& numbers, double& min, double& max)
 {
+    if (numbers.size()==0)
+    {
+        return;
+    }
+
     min = numbers[0];
     max = numbers[0];
     for (double x : numbers)

main.cpp

@@ -16,6 +16,7 @@ Input input_data()
 {
     Input in;
     size_t number_count;
+    cerr << "Enter num count >>";
     cin >> number_count;
 
     in.numbers.resize(number_count);
@@ -25,6 +26,7 @@ Input input_data()
         cin >> in.numbers[i];
     }
 
+    cerr << "Enter bin count >>";
     cin >> in.bin_count;
     return in;
 }
@@ -34,5 +36,4 @@ int main()
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_svg(bins);
-
 }

svg.cpp

@@ -5,7 +5,7 @@
 void svg_begin(double width, double height) {
     std::cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
     std::cout << "<svg ";
-    std::cout << "width='" << width << "' ";
+    std::cout << "width23='" << width << "' ";
     std::cout << "height='" << height << "' ";
     std::cout << "viewBox='0 0 " << width << " " << height << "' ";
     std::cout << "xmlns='http://www.w3.org/2000/svg'>\n";
@@ -15,14 +15,28 @@ void svg_end() {
     std::cout << "</svg>\n";
 }
 
-void svg_text(double left, double baseline, std::string text) {
-        std::cout << "<text x='" << left << "' y='"<< baseline <<"'>"<< text <<"</text>";
+void svg_text(double left, double baseline, std::string text, std::size_t font_size) {
+    std::cout << "<text x='" << left << "' y='" << baseline << "' font-size='" << font_size << "'>" << text << "</text>";
 }
 
 void svg_rect(double x, double y, double width, double height, std::string stroke = "black", std::string fill = "black") {
         std::cout << "<rect x='" << x << "' y='" << y << "' width='" << width << "' height='" << height << " ' stroke='#000000' fill='#F8B496' ></rect>";
 }
 
+std::size_t in_font_size() {
+    std::size_t font_size;
+            do{
+                std::cerr << "Enter font size >>";
+                std::cin >> font_size;
+                if (font_size < 8 || font_size > 32) {
+                        std::cerr << "Please, observe the range 8-32!" << std::endl;
+                }
+            }while(font_size < 8 || font_size > 32);
+
+        return font_size;
+}
+
+
 void show_histogram_svg(const std::vector<std::size_t>& bins) {
 
     const auto IMAGE_WIDTH = 400;
@@ -32,6 +46,7 @@ void show_histogram_svg(const std::vector<std::size_t>& bins) {
     const auto TEXT_WIDTH = 50;
     const auto BIN_HEIGHT = 30;
     const auto BLOCK_WIDTH = 10;
+    std::size_t font_size = in_font_size();
 
     const std::size_t MAX_ASTERISK = IMAGE_WIDTH - TEXT_WIDTH;
     svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
@@ -47,7 +62,7 @@ void show_histogram_svg(const std::vector<std::size_t>& bins) {
     if (maxbin<=76) {
         for (std::size_t i=0; i < bins.size(); i++) {
             double bin_width= MAX_ASTERISK * (static_cast<double>(bins[i]) / maxbin);
-            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]));
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]), font_size);
             svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
             top += BIN_HEIGHT;
         }
@@ -56,7 +71,7 @@ void show_histogram_svg(const std::vector<std::size_t>& bins) {
     else {
         for (std::size_t i=0; i < bins.size(); i++) {
             double bin_width = BLOCK_WIDTH * bins[i];
-            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]));
+            svg_text(TEXT_LEFT, top + TEXT_BASELINE, std::to_string(bins[i]), font_size);
             svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
             top += BIN_HEIGHT;
         }

unittest.cpp

@@ -19,4 +19,21 @@ TEST_CASE("distinct negative numbers") {
     CHECK(max == -1);
 }
 
+TEST_CASE("distinct one number") {
+    double min = 0;
+    double max = 0;
+    find_minmax({-1}, min, max);
+    CHECK(min == -1);
+    CHECK(max == -1);
+}
+
+TEST_CASE("distinct empty array") {
+    double min = 0;
+    double max = 0;
+    std::vector<double> numbers;
+    find_minmax(numbers, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}
+