code: Добавлен ситуативный ввод, callback и инд. вариант

fin_lab34.cpp

@@ -1,6 +1,7 @@
 #include <iostream>
 #include <vector>
 #include <cmath>
+#include <sstream>
 #include <string>
 #include <fstream>
 #include <curl/curl.h>
@@ -18,8 +19,9 @@ struct Input{
 };
 
 Input
-input_data(istream &thread, bool &prompt){
+input_data(istream &thread, bool prompt){
        //ïðîèçîøëà íàêëàäêà ñ èìåíàìè ïåðåìåííûõ: ïðè íàçâàíèè ïîòîêà in ðóãàåòñÿ íà ñ22, â êîòîðîé ÿêîáû îáúÿâëÿåòñÿ àðãóìåíò
+    prompt = false;
     size_t number_count;
     if (prompt) {cerr << "Enter the amount of numbers: " << endl;}
     cin >> number_count;
@@ -34,23 +36,48 @@ input_data(istream &thread, bool &prompt){
     return in;
 }
 
+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;
+    CURLcode res;
+    CURL *curl = curl_easy_init();
+    if (curl){
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        res = curl_easy_perform(curl);
+        cerr << curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP, write_data);  //var 8
+        if (res != CURLE_OK){
+            cerr << curl_easy_strerror(res);
+            exit(1);
+        }
+    return input_data(buffer, false);
+    }
+    curl_easy_cleanup(curl);
+}
+
+
 int
 main(int argc, char* argv[]){
     curl_global_init(CURL_GLOBAL_ALL);
-    CURL *curl = curl_easy_init();
-    if(argc > 1) {
-        CURLcode res;
-        curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
-        res = curl_easy_perform(curl);
-        curl_easy_cleanup(curl);
-        cerr << curl_easy_strerror(res);
-        exit(1);
+    Input input, in;
+    if (argc > 1) {
+        input = download(argv[1]);
+    } else {
+        input = input_data(cin, true);
     }
     curl_global_init(CURL_GLOBAL_ALL);
     //CURLcode curl_global_init(CURL_GLOBAL_ALL);
     size_t font = 0;
-    bool prompt = false;
-    auto in = input_data(cin, prompt);
+    //auto in = input_data(cin, prompt);
     auto bins = make_histogram(in.numbers, in.bin_count);
     //for (auto now: bins) {cout << now << endl;}
     cin >> font;