code: final

.gitignore

@@ -2,5 +2,8 @@
 /obj
 /lab01.depend
 /lab01.layout
-/main.exe
 /main.o
+/main.exe
+/unittest.layout
+/curl
+libcurl-x64.dll

lab01.cbp

@@ -33,9 +33,12 @@
 			<Add option="-fexceptions" />
 		</Compiler>
 		<Unit filename=".gitignore" />
-		<Unit filename="Header.cpp" />
-		<Unit filename="Header.h" />
+		<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>

main.cpp

@@ -1,3 +1,7 @@
+#include <curl/curl.h>
+
+#include <sstream>
+#include <string>
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
@@ -6,23 +10,54 @@ struct Input {
     vector<double> vec;
     size_t korz{};
 };
-Input input_data() {
-    Input in;
+Input input_data(istream& in, bool prompt = false) {
+    Input lin;
     size_t n, korz;
-
-    cerr << "Number of elements: ";
-    cin >> n;
-    in.vec.resize(n);
-    cerr << "Elements: ";
+    if(prompt)
+        cerr << "Number of elements: ";
+    in >> n;
+    lin.vec.resize(n);
     for (size_t i = 0; i < n; i++)
-        cin >> in.vec[i];
-    cerr << "Enter bin count: ";
-    cin >> in.korz;
-    return in;
+        in >> lin.vec[i];
+    if(prompt)
+        cerr << "Enter bin count: ";
+    in >> lin.korz;
+    return lin;
 }
 
-int main() {
-    auto in = input_data();
-    auto bins = make_histogram(in.korz, in.vec);
-    show_histogram_svg(bins);
+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& address){
+    stringstream buffer;
+    CURL* curl = curl_easy_init();
+    if (curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        CURLcode res = curl_easy_perform(curl);
+        curl_easy_cleanup(curl);
+        if (res != CURLE_OK) {
+            cerr << "cURL error: " << curl_easy_strerror(res) << endl;
+            exit(1);
+        }
+    return input_data(buffer, false);
+}
+}
+
+int main(int argc, char* argv[]) {
+    curl_global_init(CURL_GLOBAL_ALL);
+    Input input;
+    if (argc > 1) {
+       input = download(argv[1]);
+    }else{
+        input = input_data(cin, true);
+    }
+    auto bins = make_histogram(input.korz, input.vec);
+    show_histogram_svg(bins);
+    return 0;
 }

unittest.cbp

@@ -31,6 +31,10 @@
 		<Compiler>
 			<Add option="-Wall" />
 		</Compiler>
+		<Unit filename="doctest.h" />
+		<Unit filename="histogram.cpp" />
+		<Unit filename="histogram_internal.h" />
+		<Unit filename="unittest.cpp" />
 		<Extensions />
 	</Project>
 </CodeBlocks_project_file>