code: выполнено индивидуальное задание

.gitignore

@@ -1,4 +1,7 @@
 /bin
 /obj
+/curl
 /lab01.depend
-/lab01.layout
+/lab01.layout
+/unittest.depend
+/unittest.layout

histogram.cpp

@@ -0,0 +1,68 @@
+#include "histogram.h"
+
+using namespace std;
+
+void
+find_minmax(const vector<double>& numbers, double& min, double& max, bool& empty_vector)
+{
+    if (numbers.empty())
+    {
+        empty_vector = true;
+    }
+    else
+    {
+        min = numbers[0];
+        max = numbers[0];
+        for (double x : numbers)
+        {
+            if (x > max )
+            {
+                max = x;
+            }
+            if (x < min)
+            {
+                min = x;
+            }
+        }
+    }
+}
+
+vector<size_t>
+make_histogram(const vector<double>& numbers, size_t& bin_count)
+{
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax(numbers, min, max, empty_vector);
+    vector<size_t> bins(bin_count);
+    if (empty_vector)
+    {
+        for (size_t y : bins)
+        {
+            y = 0;
+        }
+    }
+    else
+    {
+        auto bin_size = (max - min)/bin_count;
+        for (double number : numbers)
+        {
+            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 <= number) && (number < hi))
+                {
+                    bins[j]++;
+                    found = true;
+                }
+            }
+            if (!found)
+            {
+                bins[bin_count - 1]++;
+            }
+        }
+    }
+    return bins;
+}

histogram.h

@@ -0,0 +1,9 @@
+#ifndef HISTOGRAM_H_INCLUDED
+#define HISTOGRAM_H_INCLUDED
+
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t& bin_count);
+
+#endif // HISTOGRAM_H_INCLUDED

histogram_internal.h

@@ -0,0 +1,9 @@
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
+
+#include <vector>
+
+void
+find_minmax(const std::vector<double>& numbers, double& min, double& max, bool& empty_vector);
+
+#endif // HISTOGRAM_INTERNAL_H_INCLUDED

lab01.cbp

@@ -31,8 +31,28 @@
 		<Compiler>
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
+			<Add directory="curl/include" />
 		</Compiler>
+		<Linker>
+			<Add library="C:/Users/ASUS X507UF/Desktop/РПОСУ/lab01/curl/lib/libcurl.dll.a" />
+			<Add directory="curl/lib" />
+		</Linker>
+		<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="text.cpp" />
+		<Unit filename="text.h">
+			<Option target="&lt;{~None~}&gt;" />
+		</Unit>
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>

main.cpp

@@ -1,85 +1,80 @@
 #include <iostream>
 #include <vector>
+#include <sstream>
+#include <string>
+#include <curl/curl.h>
+#include "histogram.h"
+#include "svg.h"
 
 using namespace std;
 
-int main()
+struct Input
 {
-    const size_t SCREEN_WIDTH = 80;
-    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
-    size_t number_count, bin_count;
-    cerr << "Enter number count: ";
-    cin >> number_count;
-    vector<double> numbers(number_count);
+    vector<double> numbers;
+    size_t bin_count{};
+};
+
+Input
+input_data(istream& stream, bool prompt)
+{
+    size_t number_count;
+    if (prompt) {
+        cerr << "Enter number count: ";
+    }
+    stream >> number_count;
+    Input in;
+    in.numbers.resize(number_count);
     for (size_t i = 0; i < number_count; i++)
     {
-        cin >> numbers[i];
+        stream >> in.numbers[i];
     }
-    cerr << "Enter bin count: ";
-    cin >> bin_count;
-    vector<size_t> bins(bin_count);
-    double min = numbers[0];
-    double max = numbers[0];
-    for (double x : numbers)
-    {
-        if (x < min)
-        {
-            min = x;
-        }
-        else if (x > max)
-        {
-            max = x;
-        }
-    }
-    auto bin_size = (max - min)/bin_count;
-    for (size_t i = 0; i < number_count; 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]++;
-        }
-    }
-    size_t max_count = 0;
-    for (size_t s = 0; s < bin_count; s++) {
-        if (bins[s] > max_count)
-            {
-                max_count = bins[s];
-            }
-    }
-    for (size_t bin : bins)
-    {
-        if (bin <100)
-        {
-            cout << " ";
-        }
-        if (bin <10)
-        {
-            cout << " ";
-        }
-        cout << bin << "|";
-        if (max_count > MAX_ASTERISK) {
-            size_t count = bin;
-            size_t height = MAX_ASTERISK * (static_cast<double>(count) / max_count);
-            for (size_t t = 0; t < height; t++)
-            {
-                cout << "*";
-            }
-        }
-        else for (size_t k = 0; k < bin; k++)
-            {
-                cout << "*";
-            }
-        cout << endl;
+    if (prompt) {
+        cerr << "Enter bin count: ";
     }
+    stream >> in.bin_count;
+    return in;
+}
+
+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_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);
+            }
+            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);
+    }
+    if (curl_version_info(CURLVERSION_NOW) != nullptr) {
+        auto curl_ver = curl_version_info(CURLVERSION_NOW)->version;
+        cerr << "cURL version " << curl_ver << "\n";
+        auto ssl_ver = curl_version_info(CURLVERSION_NOW)->ssl_version;
+        cerr << "SSL version " << ssl_ver << "\n";
+    } else{ cerr<<"curl_version_info() failed \n"; }
+    vector<size_t> bins = make_histogram(input.numbers, input.bin_count);
+    show_histogram_svg(bins);
 }

svg.cpp

@@ -0,0 +1,74 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include "svg.h"
+
+using namespace std;
+
+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
+    << "' />\n";
+}
+
+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
+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 MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH;
+    size_t max_count = 0;
+    for (size_t x : bins) {
+        if (x > max_count) {
+            max_count = x;
+        }
+    }
+    if (max_count == 0) {
+        max_count = 1;
+    }
+    auto scale_factor = static_cast<double>(MAX_WIDTH) / (max_count * BLOCK_WIDTH);
+    if (scale_factor > 1) {
+        scale_factor = 1;
+    }
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+    double top = 0;
+    for (size_t bin : bins) {
+        double bin_width = BLOCK_WIDTH * bin * scale_factor;
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT);
+        top += BIN_HEIGHT;
+    }
+    svg_end();
+}

svg.h

@@ -0,0 +1,9 @@
+#ifndef SVG_H_INCLUDED
+#define SVG_H_INCLUDED
+
+#include <vector>
+
+void
+show_histogram_svg(const std::vector<size_t>& bins);
+
+#endif // SVG_H_INCLUDED

svg_internal.h

@@ -0,0 +1,7 @@
+#ifndef SVG_INTERNAL_H_INCLUDED
+#define SVG_INTERNAL_H_INCLUDED
+
+bool
+check_width(double width);
+
+#endif // SVG_INTERNAL_H_INCLUDED

text.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include "text.h"
+
+using namespace std;
+
+void
+show_histogram_text(const vector<size_t>& bins, size_t& bin_count)
+{
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    size_t max_count = 0;
+    for (size_t s = 0; s < bin_count; s++)
+    {
+        if (bins[s] > max_count)
+        {
+            max_count = bins[s];
+        }
+    }
+    if (max_count == 0)
+    {
+        max_count = 1;
+    }
+    auto scale_factor = static_cast<double>(MAX_ASTERISK) / max_count;
+    if (scale_factor > 1)
+    {
+        scale_factor = 1;
+    }
+    for (size_t bin : bins)
+    {
+        if (bin <100)
+        {
+            cout << " ";
+        }
+        if (bin <10)
+        {
+            cout << " ";
+        }
+        cout << bin << "|";
+        size_t height = bin * scale_factor;
+        for (size_t t = 0; t < height; t++)
+        {
+            cout << "*";
+        }
+        cout << endl;
+    }
+}

text.h

@@ -0,0 +1,9 @@
+#ifndef TEXT_H_INCLUDED
+#define TEXT_H_INCLUDED
+
+#include <vector>
+
+void
+show_histogram_text(const std::vector<size_t>& bins, size_t& bin_count);
+
+#endif // TEXT_H_INCLUDED

unittest.cbp

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<CodeBlocks_project_file>
+	<FileVersion major="1" minor="6" />
+	<Project>
+		<Option title="unittest" />
+		<Option pch_mode="2" />
+		<Option compiler="gcc" />
+		<Build>
+			<Target title="Debug">
+				<Option output="bin/Debug/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Debug/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-g" />
+				</Compiler>
+			</Target>
+			<Target title="Release">
+				<Option output="bin/Release/unittest" prefix_auto="1" extension_auto="1" />
+				<Option object_output="obj/Release/" />
+				<Option type="1" />
+				<Option compiler="gcc" />
+				<Compiler>
+					<Add option="-O2" />
+				</Compiler>
+				<Linker>
+					<Add option="-s" />
+				</Linker>
+			</Target>
+		</Build>
+		<Compiler>
+			<Add option="-Wall" />
+		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram_internal.h" />
+		<Unit filename="unittest.cpp" />
+		<Extensions>
+			<lib_finder disable_auto="1" />
+		</Extensions>
+	</Project>
+</CodeBlocks_project_file>

unittest.cpp

@@ -0,0 +1,54 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax({1, 2}, min, max, empty_vector);
+    CHECK(empty_vector == false);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+
+TEST_CASE("the only number") {
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax({1}, min, max, empty_vector);
+    CHECK(empty_vector == false);
+    CHECK(min == 1);
+    CHECK(max == 1);
+}
+
+TEST_CASE("negative numbers") {
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax({-1, -2}, min, max, empty_vector);
+    CHECK(empty_vector == false);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+
+TEST_CASE("identical numbers") {
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax({2, 2}, min, max, empty_vector);
+    CHECK(empty_vector == false);
+    CHECK(min == 2);
+    CHECK(max == 2);
+}
+
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    bool empty_vector = false;
+    find_minmax({}, min, max, empty_vector);
+    CHECK(empty_vector == true);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}