code: конечный код

main.cpp

@@ -1,9 +1,12 @@
-#include <iostream>
+
 #include <vector>
+#include <iostream>
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 
 using namespace std;
 
@@ -13,84 +16,69 @@ struct Input
     size_t bin_count{};
 };
 
-Input
-input_data(istream& inn)
+Input input_data(istream& inx, bool prompt)
 {
-
-    bool prompt;
-    int reshenie;
-    cerr << "Show prompts? (1 for yes, 2 for no):";
-    inn >> reshenie;
-    if(reshenie == 1)
-    {
-        prompt = true;
-    }
-    else
-    {
-        prompt = false;
-    }
-
-
     size_t number_count;
-    if (prompt)
-    {
-        cerr << "Enter number count: ";
-    }
-    inn >> number_count;
+    if (prompt) cerr << "Enter number count: ";
+    inx >> number_count;
+
 
     Input in;
     in.numbers.resize(number_count);
 
     vector<double> numbers(number_count);
+    if (prompt) cerr << "Input some numbers: ";
     for (int i = 0; i < number_count; i++)
     {
-        if (prompt)
-        {
-            cerr << "Number[" << i << "]=";
-        }
-        inn >> in.numbers[i];
+        inx >> in.numbers[i];
     }
 
-    if (prompt)
-    {
-        cerr << "Enter bin count: ";
-    }
-    inn >> in.bin_count;
+    if (prompt) cerr << "Enter bin count: ";
+    inx >> in.bin_count;
     return in;
 }
-size_t write_data(void* ptr, size_t size, size_t nmemb, void* stream)
-{
-    size_t written = fwrite(ptr, size, nmemb, stdout);
-    return written;
+
+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;
 }
 
-int main(int argc, char* argv[])
-{
-    if (argc > 1)
-    {
-        CURL* curl = curl_easy_init();
-        if (curl)
-        {
-            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
-            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+Input
+download(const string& address) {
+    stringstream buffer;
+    CURL* curl = curl_easy_init();
+    if (curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
 
-            CURLcode res = curl_easy_perform(curl);
-            if (res != CURLE_OK)
-            {
-                cerr << "cURL error: " << curl_easy_strerror(res) << endl;
-            }
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
 
+        CURLcode res = curl_easy_perform(curl);
+        if (res != CURLE_OK) {
+            cerr << "cURL error: " << curl_easy_strerror(res) << endl;
             curl_easy_cleanup(curl);
+            exit(1);
         }
-        else
-        {
-            cerr << "curl_easy_init() failed" << endl;
-        }
-        return 0;
+        curl_easy_cleanup(curl);
+    } else {
+        cerr << "curl_easy_init() failed" << endl;
+        exit(1);
     }
-    curl_global_init(CURL_GLOBAL_ALL);
-    auto in = input_data(cin);
-    auto bins = make_histogram(in.numbers, in.bin_count);
+
+    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);
+    }
+
+    const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins);
-    return 0;
 }