code: Добавление гистограмы

histogram.cpp

@@ -0,0 +1,47 @@
+#include <iostream>
+#include <vector>
+#include "histogram.h"
+using namespace std;
+
+void
+find_minmax(const vector<double>& numbers, double& min, double& max) {
+    min = numbers[0];
+    for (size_t i = 1; i < numbers.size(); i++) {
+        if (numbers[i] < min) {
+            min = numbers[i];
+        }
+        else if (numbers[i] > max) {
+            max = numbers[i];
+        }
+    }
+}
+
+vector<size_t>
+make_histogram(const vector <double>& numbers, size_t bin_count) {
+    double minc, maxc;
+    find_minmax(numbers, minc, maxc);
+    vector<size_t> bins(bin_count);
+    double bin_size = (maxc - minc) / bin_count;
+    size_t bin_max_size = 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 = minc + j * bin_size;
+            auto hi = minc + (j + 1) * bin_size;
+            if ((lo <= numbers[i]) && (numbers[i] < hi)) {
+                bins[j]++;
+                found = true;
+                if (bins[j] > bin_max_size) {
+                    bin_max_size = bins[j];
+                }
+            }
+        }
+        if (!found) {
+            bins[bin_count - 1]++;
+            if (bins[bin_count - 1] > bin_max_size) {
+                bin_max_size = bins[bin_count - 1];
+            }
+        }
+    }
+    return bins;
+}

histogram.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t bin_count);
+