cs-lab34/main.cpp

#include <sstream>
#include <string>
#include <curl/curl.h>
#include <iostream>
#include <vector>
#include "histogram.h"
#include "text.h"

using namespace std;

//  Ñòðóêòóðà

    struct Input
    {
        vector<double> numbers;
        size_t bin_count{};
    };

//  Ââîä îöåíêîê ñ êëàâèàòóðû.

Input
input_data(istream& in, bool prompt)
{
    Input local;
    size_t number_count;

    cerr << "Enter number count: ";
    in >> number_count;
    local.numbers.resize(number_count);
    for (size_t i = 0; i < number_count; i++)
        in >> local.numbers[i];
    if (prompt)
        cerr << "Enter bin count: ";
    in >> local.bin_count;
    return local;
}

Input
download(const string& address)
{
    stringstream buffer;

    CURL *curl = curl_easy_init();
    if(curl)
        {
            CURLcode res;
            curl_easy_setopt(curl, CURLOPT_URL, address);
            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);
}

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[])
{
    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);
}