cs-lab34/main.cpp

#include <iostream>
#include <vector>


using namespace std;

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

Input
input_data() {
    Input in;

    size_t number_count;
    size_t bin_count;

    cerr << "Enter number count: ";
    cin >> in.number_count;
    cerr << "Enter bin count: ";
    cin >> in.bin_count;

    in.numbers.resize(in.number_count);

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

    return in;
};

void find_minmax(const vector<double>& numbers, double& min, double& max) {             //  Ïîèñê ìàêñèìóìà è ìèíèìóìà ñðåäè îöåíîê.
    min=numbers[0];
    max=numbers[0];
    for (double x : numbers) {
        if (x<min) {
            min=x;
        } else {
            if (x>max) {
                max=x;
            }
        }
    }

    return;
}

vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count)
{
    double min, max;
    find_minmax(numbers, min, max);

//  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 < numbers.size(); 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]++;
        }
    }
    return bins;
}

void show_histogram_text(vector<size_t>& bins, size_t bin_count)
{
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 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;

    for (size_t i = 0; i < bin_count; i++) {
        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;
    }
}

int main() {

    auto in = input_data();
    auto bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_text(bins, in.bin_count);
    return 0;
}