cs-lab34/main.cpp

#include <iostream>
#include <vector>
using namespace std;

int main()
{
//  Ââîä îöåíêîê ñ êëàâèàòóðû.

    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
    size_t number_count, bin_count;

    cerr << "Enter number count: ";
    cin >> number_count;

    vector<double> numbers(number_count);

    for (size_t i = 0; i < number_count; i++)
        cin >> numbers[i];

    cerr << "Enter bin count: ";
    cin >> bin_count;

//  Ïîèñê ìàêñèìóìà è ìèíèìóìà ñðåäè îöåíîê.

    double min = numbers[0];
    double max = numbers[0];

    for (double x : numbers)
        {
            if (x < min)
                min = x;
            else if (x > max)
                max = x;
        }

//  Ñîçäàíèå êîðçèí äëÿ äàëüíåéøåé ñîðòèðîâêè îöåíîê ïî íèì.

    double bin_size = (max - min) / bin_count;

    vector<size_t> bins(bin_count);

    for (size_t i = 0; i < bin_count; i++)
        bins[i] = 0;

//  Ñîðòèðîâêà îöåíîê ïî êîðçèíàì.

    for (size_t i = 0; i < number_count; i++)
        {
            bool found = false;
            for (size_t j = 0; (j < bin_count - 1) && !found; j++)
                {
                    auto lo = min + j * bin_size;
                    auto hi = min + (j + 1) * bin_size;
                    if ((lo <= numbers[i]) && (numbers[i] < hi))
                        {
                            bins[j]++;
                            found = true;
                        }
                }
            if (!found)
                bins[bin_count - 1]++;
        }

//  Ïîèñê ìàêñèìàëüíîãî êîëè÷åñâà îöåíîê â îäíîì ñòîëáöå.

    size_t max_count = bins[0];

    for (size_t i = 0; i < bin_count; i++)
        {
            if (bins[i] > max_count)
                max_count = bins[i];
        }

//  Ñîçäàíèå ãèñòîãðàììû ïî îöåíêàì.

    size_t height;
    size_t buf;

    for (size_t i = 0; i < bin_count; i++)
        {
            buf = bins[i];
            while (buf < max_count) //  Âûðàâíèâàíèå äëÿ ÷èñåë, ìåíüøèõ ÷åì ìàêñèìàëüíîå ÷èñëî.
                {
                    cout << " ";
                    buf *= 10;
                }
            cout << bins[i] << "|";
            height = bins[i];
            if (max_count > MAX_ASTERISK)
                height = MAX_ASTERISK * (static_cast<double>(bins[i]) / max_count);
            for (size_t j = 1; j <= height; j++)
                cout << "*";
            cout << endl;
        }
    return 0;
}