cs-lab34/Histogram/main.cpp

#include <iostream>
#include <vector>

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

Input input_data() {
    size_t number_count;
    std::cerr << "Enter number count: ";
    std::cin >> number_count;

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

    std::cerr << "Enter bucket: ";
    std::cin >> in.bin_count;

    return in;
};

size_t find_minmax(const std::vector<double>& numbers, double& min, double& max) {
    if (numbers.empty()) {
        min = max = 0;
        return 0;
    }
    min = numbers[0];
    max = numbers[0];
    for (double number : numbers) {
        if (number < min) {
            min = number;
        }
        if (number > max) {
            max = number;
        }
    }
    return 0;
}
std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count) {
    std::vector<size_t> bins(bin_count, 0);
    if (numbers.empty() || bin_count == 0) {
        return bins;
    }
    double min, max;
    find_minmax(numbers, min, max);
    if (max == min) {
        return bins; // Âîçâðàùàåì ïóñòûå êîðçèíû, òàê êàê ãèñòîãðàììà íå ìîæåò áûòü ïîñòðîåíà
    }
    double bin_width = (max - min) / bin_count;
    for (double number : numbers) {
        size_t bin_index = static_cast<size_t>((number - min) / bin_width);
        if (bin_index >= bin_count) {
            bin_index = bin_count - 1; // Îáðàáîòêà êðàéíåãî ñëó÷àÿ max == number
        }
        bins[bin_index]++;
    }
    return bins;
};

void show_histogram_text(const std::vector<size_t>& bins) {
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
    size_t max_bin = 0;
    for (size_t bin : bins) {
        if (bin > max_bin) {
            max_bin = bin;
        }
    }
    for (size_t bin_value : bins) {
        if (bin_value < 100) std::cout << " ";
        if (bin_value < 10) std::cout << " ";
        std::cout << bin_value << " |";
        size_t height = bin_value;
        if (max_bin > MAX_ASTERISK) {
            height = static_cast<size_t>(MAX_ASTERISK * (static_cast<double>(bin_value) / max_bin));
        }
        for (size_t i = 0; i < height; ++i) {
            std::cout << "*";
        }
        std::cout << "\n";
    }
};
using namespace std;

int main()
{
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;


    int number_count, bucket;

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

    std::cerr << "Enter numbers: \n";
    vector <double> numbers(number_count);
    for (int i = 0; i < number_count; i++) cin >> numbers[i];

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

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

    if (max == min) {// ïðîâåðêà íà àíîìàëèþ
        std::cout << " Unable to create a histogram." << std::endl;
        return 1;
    }

    cerr << "Enter bucket: "; cin >> bucket;

    float k = (max - min) / bucket;

    if (numbers.empty()) {//áûëè ëè ââåäåíû ÷èñëà
        std::cout << "Empty. unable to  create histogram." << std::endl;
        return 1;
    }

    vector <int> stolb(bucket);
    vector <int> proz(stolb);

    for (int j = 0; j < bucket; j++) stolb[j] = 0;

    for (int i = 0; i < number_count; i++)
    {
        bool flag = false;
        for (int j = 0; (j < bucket && !flag); j++)
        {
            if (numbers[i] >= (min + k * j) && numbers[i] < (min + k * (1 + j)))
            {
                stolb[j]++;
                flag = true;

            }
        }
        if (!flag) stolb[bucket - 1]++;
    }

    int maxlen = 0;
    for (int j = 0; j < bucket; j++)
    {
        if (maxlen < stolb[j]) maxlen = stolb[j];
    }

    for (int j = 0; j < bucket; j++)
    {
        if (stolb[j] < 100) cout << " ";
        if (stolb[j] < 10) cout << "";
        cout << stolb[j] << " |";
        size_t height = stolb[j];
        if (maxlen > MAX_ASTERISK)
        {
            if (maxlen != stolb[j]) height = MAX_ASTERISK * (static_cast <float>(stolb[j]) / maxlen);
            else if (maxlen == stolb[j]) height = MAX_ASTERISK;
        }
        for (int i = 0; i < height; i++) cout << "*";
        cout << "\n";
    }

    return 0;
}