сделал варик 3

project/histogram.cpp

@@ -2,42 +2,62 @@
 #include <vector>
 #include "histogram.h"
 using namespace std;
-static void
-find_minmax(vector<double> numbers, double& min, double& max) {
-    min = numbers[0];
-    max = numbers[0];
-    for (double x : numbers) {
-    if (x < min) {
-        min = x;
+bool
+find_minmax(vector<double> numbers, double& min, double& max)
+{
+    bool check;
+    if(numbers.size()==0)
+    {
+
+        check = false;
     }
-    else if (x > max) {
-        max = x;
+    else
+    {
+        min = numbers[0];
+        max = numbers[0];
+        for (double x : numbers)
+        {
+            if (x < min)
+            {
+                min = x;
+            }
+            else if (x > max)
+            {
+                max = x;
+            }
+        }
     }
-}
+   return check;
 }
 
 vector<size_t>
-make_histogram(vector<double> numbers, size_t bin_count) {
+make_histogram(vector<double> numbers, size_t bin_count)
+{
     vector <size_t> bins(bin_count);
     double min, max;
-    find_minmax(numbers, min, max);
+    bool check;
+    check = find_minmax(numbers, min, max);
     size_t countt;
     double bin_size = (max - min) / bin_count;
-    for (size_t i = 0; i < numbers.size(); i++) {
-    bool found = false;
-    for (size_t j = 0; (j < bin_count - 1) && !found; j++) {
-        auto lo = min + j * bin_size;
-        auto hi = min + (j + 1) * bin_size;
-        if ((lo <= numbers[i]) && (numbers[i] < hi)) {
-            bins[j]++;
-            found = true;
+    for (size_t i = 0; i < numbers.size(); i++)
+    {
+        bool found = false;
+        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
+        {
+            auto lo = min + j * bin_size;
+            auto hi = min + (j + 1) * bin_size;
+            if ((lo <= numbers[i]) && (numbers[i] < hi))
+            {
+                bins[j]++;
+                found = true;
+            }
+        }
+        if (!found)
+        {
+            bins[bin_count - 1]++;
         }
     }
-        if (!found) {
-        bins[bin_count - 1]++;
-    }
-    }
-        return bins;
+    return bins;
 
 
 }

project/main.cpp

@@ -1,31 +1,91 @@
+#include <curl/curl.h>
 #include <iostream>
 #include <vector>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
+#include "emptiness.h"
+#include <sstream>
+#include <string>
 using namespace std;
-struct Input {
+struct Input
+{
     vector<double> numbers;
     size_t bin_count{};
 };
 
 Input
-input_data(){
+input_data(istream& tin, bool prompt)
+{
     size_t number_count;
-    cerr << "Enter number count: ";
-    cin >> number_count;
+    if (prompt)
+        cerr << "Enter number count: ";
+    tin >> number_count;
     Input in;
     in.numbers.resize(number_count);
-    for(int i;i<number_count;i++)
+    for(int i; i<number_count; i++)
     {
-        cin >> in.numbers[i];
+        tin >> in.numbers[i];
     }
-    cerr << "Enter bin count: ";
-    cin >> in.bin_count;
+    if (prompt)
+        cerr << "Enter bin count: ";
+    tin >> in.bin_count;
     return in;
 }
-int main()
-{   Input in = input_data();
-    auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, in.bin_count);
-    return 0;
+
+size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx)
+{
+    size_t data_size = item_size * item_count;
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    buffer->write(reinterpret_cast<const char*>(items), data_size);
+    return data_size;
 }
+
+Input
+download(const string& address)
+{
+    stringstream buffer;
+    CURL *curl = curl_easy_init();
+    if(curl)
+    {
+        CURLcode res;
+        curl_off_t speed;
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        res = curl_easy_perform(curl);
+
+        if (res != CURLE_OK)
+        {
+            fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(res));
+            exit(1);
+        }
+        res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD_T, &speed);
+        if(!res)
+        {
+            cerr<<"Download speed bytes/sec:  " <<speed;
+        }
+
+        curl_easy_cleanup(curl);
+
+    }
+    return input_data(buffer, false);
+}
+
+int
+main(int argc, char* argv[])
+{
+    Input input;
+    if (argc > 1)
+    {
+        input = download(argv[1]);
+    }
+    else
+    {
+        input = input_data(cin, true);
+    }
+
+    const auto bins = make_histogram(input.numbers, input.bin_count);
+    show_histogram_svg(bins);
+}
+

project/project.cbp

@@ -13,7 +13,12 @@
 				<Option compiler="gcc" />
 				<Compiler>
 					<Add option="-g" />
+					<Add directory="curl/include" />
 				</Compiler>
+				<Linker>
+					<Add library="libcurl.dll.a" />
+					<Add directory="curl/lib" />
+				</Linker>
 			</Target>
 			<Target title="Release">
 				<Option output="bin/Release/project" prefix_auto="1" extension_auto="1" />
@@ -32,7 +37,31 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename=".gitignore" />
+		<Unit filename="emptiness.cpp" />
+		<Unit filename="emptiness.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="histogram_internal.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="tasktest.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
+		<Unit filename="test.cpp" />
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Extensions />
 	</Project>
 </CodeBlocks_project_file>

project/svg.cpp

@@ -0,0 +1,65 @@
+#include <math.h>
+#include <iostream>
+#include <conio.h>
+#include <vector>
+#include <string>
+#include "svg.h"
+#include "emptiness.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, string fill) {
+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 = 10;
+    const auto TEXT_BASELINE = 20;
+    const auto TEXT_WIDTH = 50;
+    const auto BIN_HEIGHT = 30;
+    const auto BLOCK_WIDTH = 10;
+    const double MAX_WIDTH = IMAGE_WIDTH-TEXT_WIDTH;
+
+
+    svg_begin(IMAGE_WIDTH,IMAGE_HEIGHT);
+
+    double top = 0;
+double max_count = bins[0];
+    for (size_t i = 0; i < bins.size(); i++) {
+        if (bins[i] > max_count)
+            max_count = bins[i];
+    }
+    for (size_t bin : bins) {
+        const double bin_width = MAX_WIDTH * (bin/max_count);
+        double emptiness_width = emptiness(MAX_WIDTH,bin_width);
+        svg_text(TEXT_LEFT + MAX_WIDTH, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(emptiness_width, top, bin_width, BIN_HEIGHT, "red", "#aaffaa");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}

project/svg.h

@@ -0,0 +1,7 @@
+#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

@@ -0,0 +1,38 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "project\emptiness.h"
+#include "project\histogram_internal.h"
+
+TEST_CASE("difference check") {
+    double a = 20;
+    double b = 10;
+    double c = emptiness(a,b);
+    CHECK(c == 10);
+    CHECK(c > 0);
+    }
+TEST_CASE("more then 0 check") {
+    double a = 20;
+    double b = 10;
+    double c = emptiness(a,b);
+    CHECK(c > 0);
+    }
+TEST_CASE("less then 0 check") {
+    double a = 10;
+    double b = 20;
+    double c = emptiness(a,b);
+    CHECK(c < 0);
+    }
+TEST_CASE("not 0 check") {
+    double a = 20;
+    double b = 10;
+    double c = emptiness(a,b);
+    CHECK(c != 0);
+    }
+TEST_CASE("is massif full") {
+    double min = 0;
+    double max = 0;
+    std::vector<double>v{};
+    bool c = find_minmax(v,min,max);
+    CHECK(c == false);
+    }