cs-lab34/main.cpp

#include <iostream>
#include <vector>


using namespace std;

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

Input input_data() {
    Input in;
    int number_count;

    do {
        cout << "Enter number count: ";
        cin >> number_count;
    } while (number_count < 1);

    do {
        cout << "Enter bucket: ";
        cin >> in.bin_count;
    } while (in.bin_count < 1);

    cout << "\n";

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

    return in;
}

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

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

    float k = (max - min) / bin_count;
    vector<size_t> bins(bin_count, 0);

    for (double number : numbers) {
        bool flag = false;
        for (size_t j = 0; (j < bin_count && !flag); j++) {
            if (number >= (min + k * j) && number < (min + k * (j + 1))) {
                bins[j]++;
                flag = true;
            }
        }
        if (!flag) bins[bin_count - 1]++;
    }

    return bins;
}

void show_histogram_text(const vector<size_t>& bins) {
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;

    size_t max_count = 0;
    for (size_t count : bins) {
        if (count > max_count) {
            max_count = count;
        }
    }

    for (size_t bin : bins) {
        if (bin < 100) cout << " ";
        if (bin < 10) cout << " ";
        cout << bin << "|";

        size_t height = bin;
        if (max_count > MAX_ASTERISK) {
            if (max_count != bin)
                height = MAX_ASTERISK * (static_cast<float>(bin) / max_count);
            else
                height = MAX_ASTERISK;
        }

        for (size_t i = 0; i < height; i++) cout << "*";
        cout << "\n";
    }
}

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