cs-lab34/lab01.cpp

#include <math.h>
#include <iostream>
#include <conio.h>
#include <vector>
using namespace std;


vector<double>
input_numbers(size_t count) {
	vector<double> result(count);
	cerr << "Enter numbers: ";
	for (size_t i = 0; i < count; i++) {
		cin >> result[i];
	}
	return result;
}



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

		if (number > max)
		{
			max = number;
		}
	}
	return;
}

vector<size_t> make_histogram(const vector<double>& numbers, const size_t bin_count)
{
	double min, max;
	find_minmax(numbers, min, max);
	double bin_size = (max - min) / bin_count;
	vector<size_t> bins(bin_count, 0);
	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(const vector<size_t>& bins)
{
	const size_t SCREEN_WIDTH = 80;
	const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;

	size_t max_bin = bins[0];
	for (double bin : bins)
	{
		if (bin > max_bin)
		{
			max_bin = bin;
		}
	}

	for (size_t bin : bins)
	{
		size_t height = bin;
		// проверить масштабирование(пересчитать height)

		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()
{

//ввод данных
	size_t number_count;
	cerr << "Enter number count: ";
	cin >> number_count;

	const auto numbers = input_numbers(number_count);

	size_t bin_count;
	cerr << "Enter bin count: ";
	cin >> bin_count;
	//расчет данных

	const auto bins = make_histogram(numbers, bin_count);

	show_histogram_text(bins);

	return 0;
}