code: point 4.1 took out the make_histogram and find_minmax functionsЭ

histogram.cpp

@@ -0,0 +1,50 @@
+#include <iostream>
+#include <vector>
+
+using namespace std;
+void
+find_minmax(const std::vector<double> &numbers, double &min, double &max){
+    min = numbers[0];
+    max = numbers[0];
+    for (double x : numbers)
+    {
+        if (x < min)
+        {
+            min = x;
+        }
+        else if (x > max)
+        {
+            max = x;
+        }
+    }
+
+}
+
+std::vector<int>
+make_histogram(std::vector<double> numbers, size_t bin_count){
+    double min;
+    double max;
+    vector<int> bins(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]) && (numbers[i] < hi))
+            {
+                bins[j]++;
+                found = true;
+            }
+
+        }
+        if (!found)
+            {
+                bins[bin_count - 1]++;
+            }
+    }
+    return bins;
+}

histogram.h

@@ -0,0 +1,9 @@
+#ifndef HISTOGRAM_H_INCLUDED
+#define HISTOGRAM_H_INCLUDED
+
+#include <vector>
+#include <iostream>
+std::vector<int>
+make_histogram(std::vector<double> numbers, size_t bin_count);
+
+#endif 

main.cpp

@@ -1,5 +1,6 @@
 #include <iostream>
 #include <vector>
+#include "histogram.h"
 
 using namespace std;
 
@@ -26,53 +27,6 @@ input_data(){
     return in;
 }
 
-void
-find_minmax(const std::vector<double> &numbers, double &min, double &max){
-    min = numbers[0];
-    max = numbers[0];
-    for (double x : numbers)
-    {
-        if (x < min)
-        {
-            min = x;
-        }
-        else if (x > max)
-        {
-            max = x;
-        }
-    }
-
-}
-
-std::vector<int>
-make_histogram(std::vector<double> numbers, size_t bin_count){
-    double min;
-    double max;
-    vector<int> bins(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]) && (numbers[i] < hi))
-            {
-                bins[j]++;
-                found = true;
-            }
-
-        }
-        if (!found)
-            {
-                bins[bin_count - 1]++;
-            }
-    }
-    return bins;
-}
-
 void
 show_histogramm_text(vector<int> bins, vector<double> numbers, size_t bin_count){
 
@@ -151,9 +105,6 @@ main()
     
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    double min;
-    double max;
-    find_minmax(in.numbers, min, max);
     show_histogramm_text(bins, in.numbers, in.bin_count);
 }