Исправление ошибки работы с ссылками

.gitignore

@@ -1,4 +1,4 @@
-
+curl/
 bin/
 obj/
 *.cbp

histogram.cpp

@@ -2,9 +2,15 @@
 #include <vector>
 using namespace std;
 
-static void find_minmax(const vector<double>& numbers, double& min, double& max) {
+void find_minmax(const vector<double>& numbers, double& min, double& max) {
+    if (numbers.empty())
+    {
+        min = 0;
+        max = 0;
+        return;
+    }
     max = numbers[0];
-    min = numbers[1];
+    min = numbers[0];
     for (double x : numbers) {
         if (x < min) min = x;
         else if (x > max) max = x;

histogram_internal.h

@@ -0,0 +1,6 @@
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
+
+void find_minmax(const std::vector<double>& numbers, double& min, double& max);
+
+#endif

lab01.cbp

@@ -32,7 +32,14 @@
 			<Add option="-Wall" />
 			<Add option="-fexceptions" />
 		</Compiler>
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram.h" />
+		<Unit filename="histogram_internal.h" />
 		<Unit filename="main.cpp" />
+		<Unit filename="svg.cpp" />
+		<Unit filename="svg.h" />
+		<Unit filename="text.cpp" />
+		<Unit filename="text.h" />
 		<Extensions>
 			<lib_finder disable_auto="1" />
 		</Extensions>

main.cpp

@@ -2,6 +2,10 @@
 #include <vector>
 #include "histogram.h"
 #include "text.h"
+#include "svg.h"
+#include <curl/curl.h>
+#include <sstream>
+#include <string>
 using namespace std;
 
 struct Input {
@@ -9,26 +13,66 @@ struct Input {
     size_t bin_count;
 };
 
-Input input_data() {
-    Input in;
+Input input_data(istream& in, bool prompt) {
+    Input inp;
     size_t number_count;
-    cerr << "Enter number count: ";
-    cin >> number_count;
-
-    in.numbers.resize(number_count);
-    cerr << "Enter numbers: ";
+    if (prompt){
+        cerr << "Enter number count: ";
+    }
+    in >> number_count;
+    inp.numbers.resize(number_count);
+    if (prompt){
+                cerr << "Enter numbers: ";
+        }
     for (size_t i = 0; i < number_count; i++) {
-        cin >> in.numbers[i];
+        in >> inp.numbers[i];
     }
 
-    cerr << "Enter bin count: ";
-    cin >> in.bin_count;
-    return in;
+    if (prompt) {
+            cerr << "Enter bin count: ";
+    }
+    in >> inp.bin_count;
+    return inp;
 }
 
-int main() {
-    auto in = input_data();
-    auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_text(bins, in.bin_count);
+size_t
+write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    size_t data_size = item_size * item_count;
+    (*buffer).write(reinterpret_cast<const char*>(items), data_size);
+    return data_size;
+}
+
+Input
+download(const string& adress){
+    stringstream buffer;
+    CURL* curl = curl_easy_init();
+    if(curl) {
+
+        CURLcode res;
+        curl_easy_setopt(curl, CURLOPT_URL, adress.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){
+            cerr << 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);
+    }
+
+    auto bins = make_histogram(input.numbers, input.bin_count);
+    show_histogram_svg(bins);
     return 0;
 }
+

marks.txt

@@ -0,0 +1,3 @@
+10
+3 3 4 4 4 4 4 5 5 5
+3

svg.cpp

@@ -0,0 +1,62 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include "svg.h"
+
+using namespace std;
+
+void svg_begin(double width, double height) {
+    cout << "<?xml version='1.0' encoding='UTF-8'?>\n";
+    cout << "<svg "
+         << "width='" << width << "' "
+         << "height='" << height << "' "
+         << "viewBox='0 0 " << width << " " << height << "' "
+         << "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>\n";
+}
+
+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 show_histogram_svg(const vector<size_t>& bins) {
+    if (bins.empty()) {
+        cerr << "Error: Empty bins vector\n";
+        return;
+    }
+
+    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 MAX_WIDTH = IMAGE_WIDTH - TEXT_WIDTH;
+
+    svg_begin(IMAGE_WIDTH, IMAGE_HEIGHT);
+
+    double top = 0;
+    size_t max_count = bins[0];
+    for (size_t bin : bins) {
+        if (max_count < bin) {
+            max_count = bin;
+        }
+    }
+
+    for (size_t bin : bins) {
+        const double bin_width = MAX_WIDTH * (static_cast<double>(bin) / max_count);
+        svg_text(TEXT_LEFT, top + TEXT_BASELINE, to_string(bin));
+        svg_rect(TEXT_WIDTH, top, bin_width, BIN_HEIGHT, "black", "red");
+        top += BIN_HEIGHT;
+    }
+
+    svg_end();
+}

svg.h

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

unittest.cpp

@@ -0,0 +1,44 @@
+#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;
+    find_minmax({1, 2}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}
+
+
+TEST_CASE("distinct negative numbers"){
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+TEST_CASE("vector of the same elements"){
+    double min = 0;
+    double max = 0;
+    find_minmax({3,3,3}, min, max);
+    CHECK(min == 3);
+    CHECK(max == 3);
+}
+
+TEST_CASE("single element vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({7}, min, max);
+    CHECK(min == 7);
+    CHECK(max == 7);
+}
+
+TEST_CASE("empty vector") {
+    double min = 0;
+    double max = 0;
+    find_minmax({}, min, max);
+    CHECK(min == 0);
+    CHECK(max == 0);
+}