cs-lab34/main.cpp

#include <iostream>
#include <vector>


using namespace std;

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

Input
input_data() {
    Input in;
    cin >> in.number_count;
    cin >> in.bucket;
    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) {
    min = numbers[0];
    max = numbers[0];
    for (double x : numbers)
    {
        if (x < min) min = x;
        else if (x > max) max = x;
    }
}

vector <size_t>
make_histogram(const vector<double>& numbers, size_t bucket, size_t number_count) {
    vector <size_t> stolb(bucket);
    double min, max;
    find_minmax (numbers, min, max);
    float k = (max-min)/bucket;
    for (size_t i = 0; i < bucket; i++) stolb[i] = 0;
    for (size_t i = 0; i < number_count; i++)
    {
        bool flag = false;
        for (size_t 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]++;
    }
    return stolb;
}

void
show_histogram_text(vector <size_t> stolb, size_t bucket) {
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 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";
    }}


int main()
{

    auto in = input_data();
    auto stolb = make_histogram(in.numbers, in.bucket, in.number_count);
    show_histogram_text(stolb, in.bucket);

    return 0;
}