cs-lab34/main.cpp

#include <vector>
#include <iostream>
#include <cstdio>

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

void find_minmax(vector<double> numbers, double& min, double& max);
size_t maxBin(vector<size_t> bins);
vector<size_t> make_histogram(vector<double> numbers, size_t bin_count);
Input input_data();
void show_histogram_text(vector<size_t> bins , size_t bin_count);
const size_t SCREEN_WIDTH = 80;
const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;

int main()
{

    Input in = input_data();
    vector<size_t> bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_text(bins, in.bin_count);
    return 0;
}

size_t maxBin(vector<size_t> bins) {
    size_t max = bins[0];
    for (int i = 1; i < bins.size(); i++) {
        if (max < bins[i]) {
            max = bins[i];
        }
    }
    return max;
}
void find_minmax(vector<double> numbers, double& min, double& max) {
    min = numbers[0];
    max = numbers[0];
    for (double number : numbers) {
        if (min > number) {
            min = number;
        }
        if (max < number) {
            max = number;
        }
    }
    return;
}


Input input_data() {
    Input input_struct;
    size_t countOfNumbers;
    cerr << "Input your count of numbers:\n";
    cin >> countOfNumbers;

    input_struct.numbers.resize(countOfNumbers);

    cerr << "Input bin count:\n";
    cin >> input_struct.bin_count;
    cerr << "Input numbers:\n";
    for (int i = 0; i < countOfNumbers; i++) {
        cerr << i << ":" << endl;
        cin >> input_struct.numbers[i];
    }
    cerr << endl;
    return input_struct;
}

vector<size_t> make_histogram(vector<double> numbers, size_t bin_count)
{
    double max;
    double min;
    vector<size_t> bins;
    bins.resize(bin_count);
    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]) && (hi > numbers[i])) {
                bins[j]++;
                found = true;
            }
        }
        if (!found) {
            bins[bin_count - 1]++;
        }
    }
    return bins;
}
void show_histogram_text(vector<size_t> bins , size_t bin_count) {
    size_t maxCount = maxBin(bins);
    size_t count_stars;
    for (size_t i = 0; i < bin_count; i++) {

        if (bins[i] < 100) {
            cout << " ";
        }
        if (bins[i] < 10) {
            cout << " ";
        }

        cout << bins[i];
        cout << "|";

        if (maxCount > MAX_ASTERISK) {
            count_stars = MAX_ASTERISK * (static_cast<double>(bins[i]) / maxCount);
        }
        else {
            count_stars = bins[i];
        }
        for (size_t i2 = 0; i2 < count_stars; i2++) {
            cout << "*";
        }
        cout << endl;


    }
}