cs.lab34/main.cpp

#include <iostream>
#include <vector>
#include <algorithm>
#include "histogram.h"
#include <curl/curl.h>
#include <sstream>
#include <string>
using namespace std;

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

static size_t write_callback(void *ptr, size_t size, size_t nmemb, void *userdata) {
    return size * nmemb;
}

Input
input_data(istream& in){
size_t number_count;
in >> number_count;
Input cin;
cin.numbers.resize(number_count);
for (size_t i = 0; i < number_count; i++){
    in >> cin.numbers[i];}
in >> cin.bin_count;
return cin;
}

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

    CURL* curl = curl_easy_init();
    curl_easy_cleanup(curl);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);

    return input_data(buffer, false);
}

size_t
write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    (*buffer).write(items, data_size);
    return 0;
}


int main(int argc, char* argv[]){
curl_global_init(CURL_GLOBAL_ALL);
CURL *curl = curl_easy_init();
if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "http://uit.mpei.ru/study/courses/cs/lab03/marks.txt");
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
    curl_easy_perform(curl);
    double speed;
    curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD, &speed);
    printf("Ñêîðîñòü çàãðóçêè ôàéëà: %.2f bytes/sec", speed);
    curl_easy_cleanup(curl);
}
    Input input;
    if (argc > 1) {
        input = download(argv[1]);
    } else {
        input = input_data(cin, true);
    }
auto in = input_data(cin);
auto bins = make_histogram(in.numbers, in.bin_count);
show_histogram(bins, in.bin_count);
return 0;
}