update

.gitignore

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+lab3.vcxproj
+lab3.vcxproj.filters
+lab3.vcxproj.user

histogram.cpp

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+#include "histogram.h"
+#include <iostream>
+#include <limits>
+
+Input input_data() {
+    Input in;
+    size_t number_count;
+
+    std::cerr << "Enter number count: ";
+    std::cin >> number_count;
+
+    in.numbers.resize(number_count);
+    std::cerr << "Enter " << number_count << " numbers: ";
+    for (size_t i = 0; i < number_count; i++) {
+        std::cin >> in.numbers[i];
+    }
+
+    std::cerr << "Enter bin count: ";
+    std::cin >> in.bin_count;
+
+    return in;
+}
+
+static void find_minmax(const std::vector<double>& numbers, double& min, double& max) {
+    min = std::numeric_limits<double>::max();
+    max = std::numeric_limits<double>::lowest();
+
+    for (double x : numbers) {
+        if (x < min) min = x;
+        if (x > max) max = x;
+    }
+}
+
+std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count) {
+    double min, max;
+    find_minmax(numbers, min, max);
+
+    if (max == min) {
+        return std::vector<size_t>(bin_count, numbers.size());
+    }
+
+    double bin_size = (max - min) / bin_count;
+    std::vector<size_t> bins(bin_count, 0);
+
+    for (double x : numbers) {
+        size_t bin_index = static_cast<size_t>((x - min) / bin_size);
+        if (bin_index >= bin_count) bin_index = bin_count - 1;
+        bins[bin_index]++;
+    }
+
+    return bins;
+}
+
+void show_histogram_text(const std::vector<size_t>& bins) {
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    size_t max_count = 0;
+
+    for (size_t count : bins) {
+        if (count > max_count) max_count = count;
+    }
+
+    std::cerr << "Bin counts:" << std::endl;
+
+    for (size_t j = 0; j < bins.size(); j++) {
+        size_t height = (max_count > MAX_ASTERISK)
+            ? static_cast<size_t>(MAX_ASTERISK * (static_cast<double>(bins[j]) / max_count))
+            : bins[j];
+
+        if (bins[j] < 10) {
+            std::cout << "  " << bins[j] << "|";
+        }
+        else if (bins[j] < 100) {
+            std::cout << " " << bins[j] << "|";
+        }
+        else {
+            std::cout << bins[j] << "|";
+        }
+
+        for (size_t k = 0; k < height; k++) std::cout << "*";
+        std::cout << std::endl;
+    }
+}

histogram.h

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+#pragma once
+
+#include <vector>
+
+struct Input {
+    std::vector<double> numbers;
+    size_t bin_count{};
+};
+
+Input input_data();
+std::vector<size_t> make_histogram(const std::vector<double>& numbers, size_t bin_count);
+void show_histogram_text(const std::vector<size_t>& bins);
+