code: проверка на нулевой массив

.gitignore

@@ -1,2 +1,4 @@
 /bin
 /obj
+/lab03.depend
+/unittest.depend

histogram.cpp

@@ -3,12 +3,18 @@
 #include <vector>
 using namespace std;
 
-void find_minmax( vector<double> numbers, double &min, double &max)
+bool find_minmax( vector<double> numbers, double &min, double &max)
 {
+    if (numbers.empty())
+    {
+        return false;
+    }
+
     min = numbers[0];
     max = numbers[0];
-       for (double x : numbers)
+    for (double x : numbers)
     {
+        max = x;
         if (x < min)
         {
             min = x;
@@ -18,7 +24,7 @@ void find_minmax( vector<double> numbers, double &min, double &max)
             max = x;
         }
     }
-    return;
+    return true;
 }
 
 vector<size_t> make_histogram (vector<double> numbers, size_t bin_count)

main.cpp

@@ -3,6 +3,7 @@
 #include <conio.h>
 #include "histogram.h"
 #include "text.h"
+#include "swg.h"
 
 using namespace std;
 
@@ -33,8 +34,7 @@ int main()
 {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, in.bin_count);
-    getch();
+    show_histogram_svg(bins);
     return 0;
 }
 

svg.cpp

@@ -0,0 +1,88 @@
+#include <math.h>
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "swg.h"
+#include "sr.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 = "black", string fill = "black")
+{
+    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;
+    const auto BLACK = "black";
+    const auto RED = "red";
+    const auto GREEN = "green";
+    const auto MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+    size_t x = sr(bins);
+
+    svg_begin(IMAGE_WIDTH,IMAGE_HEIGHT);
+
+    double top = 0;
+    double max_count = bins[0];
+    for (size_t i = 0; i < bins.size(); i++)
+    {
+        if (max_count<bins[i])
+        {
+            max_count=bins[i];
+        }
+    }
+
+
+    for (size_t bin : bins)
+    {
+        double bin_width = (MAX_WIDTH)*(bin/max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        if (bin_width<=MAX_WIDTH/max_count*x)
+        {
+            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, BLACK, GREEN);
+        }
+        else{
+            svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, BLACK, RED);
+            }
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}

swg.h

@@ -0,0 +1,8 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+#include <vector>
+
+void
+show_histogram_svg(const std::vector<size_t>& bins);
+
+#endif // SVG_H_INCLUDED

unittest.cpp

@@ -2,6 +2,7 @@
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"
 #include "histogram_internal.h"
+#include "sr.h"
 
 
 TEST_CASE("distinct positive numbers") {
@@ -38,3 +39,11 @@ TEST_CASE("vector with same elements") {
     CHECK(min == 2);
     CHECK(max == 2);
 }
+TEST_CASE("Empty vector"){
+    double min = 0;
+    double max = 0;
+    std::vector<double> numbers {};
+    CHECK(find_minmax(numbers, min, max) == false);
+
+}
+