cs-lab34/main.cpp

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

void
find_minmax(const vector<double>& numbers, double& min, double& max) {
    min = 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 bin_count){
    vector<size_t> bins(bin_count);
    double max, min = 0;
    find_minmax(numbers, min, max);
        double bin_size = (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 * 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 max_count = bins[0];
    for(size_t x: bins)
    {
        if(x > max_count)
        {
            max_count = x;
        }
    }
    if (max_count > MAX_ASTERISK)
    {
        for(size_t count: bins)
        {
            size_t height = MAX_ASTERISK * (static_cast<double>(count) /max_count);
            if (count < 10)
            {
                cout << "  " << count << "|";
            }
            else if (count < 100)
            {
                cout << " " << count << "|";
            }
            else
            {
                cout << count << "|";
            }
            for(size_t i = 0; i < height; i++)
            {
                cout << "*";
            }
            cout << "\n";
        }
    }
    else
    {
        for(size_t x : bins)
        {
            if (x < 10)
            {
                cout << "  " << x << "|";
            }
            else if (x < 100)
            {
                cout << " " << x << "|";
            }
            else
            {
                cout << x << "|";
            }
            for(size_t i = 0; i < x; i++)
            {
                cout << "*";
            }
            cout << "\n";
        }
    }
}
int main()
{
    auto in = input_data();
    auto bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_text(bins);
    return 0;
}