cs-lab34/main.cpp

#include <iostream>
#include <cmath>
#include <vector>
using namespace std;

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

Input
input_data()
{
    size_t count;  // âñå ÷èñëà
    cerr << "Count= ";
    cin >> count;

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

    cerr << "Bin_count= ";
    cin >> in.bin_count;

    return in;
}

void
find_minmax(const vector<double>& numbers, double &min, double &max)
{
    min = numbers[0];
    max = numbers[0];
    for (size_t i = 0; i < numbers.size(); i++)
    {
        if (numbers[i] > max)
            max = numbers[i];
        if (numbers[i] < min)
            min = numbers[i];
    }
}

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

    double bin_size = (max - min) / bin_count;
    low = min;
    hi = low + bin_size;
    for (size_t i = 0; i < numbers.size(); i++)
    {
        bool found = false;
        for (size_t j = 0; (j < bin_count - 1) && !found; j++)
        {
            low = min + j * bin_size;
            hi = min + (j + 1) * bin_size;
            if ((low <= numbers[i]) && (numbers[i] < hi))
            {
                bins[j]++;
                found = true;
            }
        }
        if (found == false)
        {
            bins[bin_count - 1]++;
        }

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

    size_t max_bin = bins[0];
    for (size_t bin : bins)
        if (bin > max_bin)
            max_bin = bin;
    for (size_t bin : bins)
    {
        int height = bin;
        if (max_bin > MAX_ASTERISK)
        {
            height = MAX_ASTERISK * (static_cast<double>(bin) / max_bin);
        }
        if (bin < 100)
            cout << " ";
        if (bin < 10)
            cout << " ";
        cout << bin << "|";

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


int main()
{
    Input in = input_data();
    //double bin_count{};
    auto bins=make_histogram(in.numbers,in.bin_count);
    //for (int i=0; i<in.bin_count; i++)
        //cout << bins[i];
    show_histogram_text(bins,in.bin_count);
    return 0;
}