cs-lab03/main_original.cpp

#include <iostream>
#include <vector>

using namespace std;

const size_t SCREEN_WIDTH = 80;
const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;

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

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

void
find_minmax(const vector<double>& numbers, double& min, double& max) {
    min = numbers[0];
    max = numbers[0];
    for (auto el : numbers) {
        if (el > max) {
            max = el;
        }
        if (el < min) {
            min = el;
        }
    }
}

vector<size_t> make_histogram(const vector<double>& numbers, const size_t& bin_count) {
    vector<size_t> bins(bin_count);
    double max, min;
    find_minmax(numbers, min, max);
    double binSize = (max - min) / bin_count;
    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 * binSize;
            auto hi = min + (j + 1) * binSize;
            if ((lo <= numbers[i]) && (numbers[i] < hi))
            {
                bins[j]++;
                found = true;
            }
        }
        if (!found)
        {
            bins[bin_count - 1]++;
        }
    }
    return bins;
}

void show_histogram_text(const vector<size_t>& bins) {
    size_t maxCount = bins[0];
    for (auto bin : bins) {
        if (maxCount < bin) {
            maxCount = bin;
        }
    }
    for (auto bin : bins) {
        if (bin < 100)
        {
            cout << " ";
        }
        if (bin < 10)
        {
            cout << " ";
        }
        size_t height = maxCount < MAX_ASTERISK ? bin : MAX_ASTERISK * (static_cast<double>(bin) / maxCount);
        cout << bin << "|" << string(height, '*');
        cout << "\n";
    }
}

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