до индивидуальных вариантов

main.cpp

@@ -7,6 +7,8 @@
 #include "svg.h"
 #include "histogram_internal.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 using namespace std;
 
 struct Input {
@@ -36,26 +38,44 @@ input_data(istream &tin, bool prompt){
 //
 
 
-int main(int argc, char* argv[]) {
-    if (argc > 1){
-        CURL* curl = curl_easy_init();
-        if(curl) {
-          CURLcode res;
-          curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
-          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);
+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);
         }
-        return 0;
+        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);
     }
-    curl_global_init(CURL_GLOBAL_ALL);
-    Input in = input_data(cin, false);
-    auto bins = make_histogramm(in.numbers, in.bin_count);
+    const auto bins = make_histogramm(input.numbers, input.bin_count);
     show_histogram_svg(bins);
-    return 0;
 }