cs-lab03/main.cpp

//main.cpp  -- the program gets number count, numbers and bin size, then builds a histogram.
//Task 15   -- make a scale under the histogram.

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

using namespace std;

struct Input {                                                      //data input
    vector<double> numbers;
    size_t bin_count{};
    size_t interval_task{};
};


Input
input_data(istream& in, bool prompt) {                                                      //input data structure

    if (prompt == false) {                                           //prompt output
        cerr.rdbuf(NULL);
    }

    size_t number_count;
    cerr << "Enter number count: \n";
    cerr.flush();
    in >> number_count;

    Input in_data_struct;

    in_data_struct.numbers.resize(number_count);
    for (size_t i = 0; i < number_count; i++) {
        cerr << "Enter number "<< i << " : \n";
        in >> in_data_struct.numbers[i];
    }

    cerr << "Enter bin count: \n";
    in >> in_data_struct.bin_count;

    cerr << "Enter interval from task: \n";
    in >> in_data_struct.interval_task;

    if ((in_data_struct.interval_task >= 2.0) && (in_data_struct.interval_task <= 9.0)) {       //scale interval size check
        return in_data_struct;
    } else {
        std::cout << "ERROR";                                           //error situation and program exit
        exit(1);
    }
}


int
main(int argc, char* argv[]) {
    if (argc > 1) {
        CURL* curl = curl_easy_init();
        if (curl) {
            CURLcode res;
            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
            res = curl_easy_perform(curl);

            if (CURLE_OK == 0) {
                cerr << curl_easy_strerror(res);
                exit(1);
            }

            curl_easy_cleanup(curl);
        }
        return 0;
    }

    curl_global_init(CURL_GLOBAL_ALL);
    auto in = input_data(cin, true);                                             //input data
    auto bins = make_histogram(in.numbers, in.bin_count);               //calculating bin size for the histogram
    show_histogram_svg(bins, in.interval_task);                         //histogram output in the format svg code

    return 0;
}