добавил функцию минимума и максимума

main.cpp

@@ -2,11 +2,48 @@
 #include <iostream>
 
 using namespace std;
-
+struct Input
+{
+    vector<double> numbers;
+    size_t bin_count{};
+};
+Input input_data()
+{
+    Input in;
+    size_t number_count;
+    cerr << "Enter number count: ";
+    cin >> number_count;
+    in.numbers.resize(number_count);
+    cerr << "Enter numbers: ";
+    for (size_t i = 0; i < number_count; i++) {
+        cin >> in.numbers[i];
+    }
+    size_t bin_count;
+    cerr << "Enter bin count: ";
+    cin >> in.bin_count;
+    return in;
+}
+void find_minmax(const 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;
+        }
+    }
+}
 int main()
 {
     const size_t SCREEN_WIDTH = 80;
     const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    Input in = input_data();
+    //
     size_t number_count;
     cerr << "Enter number count: ";
     cin >> number_count;
@@ -21,22 +58,23 @@ int main()
     size_t bin_count;
     cerr << "Enter bin count: ";
     cin >> bin_count;
-
+    //
     vector<size_t> bins(bin_count, 0);
-
-    double min = numbers[0];
-    double max = numbers[0];
-    for (double x : numbers)
-    {
-        if (x < min)
-        {
-            min = x;
-        }
-        else if (x > max)
-        {
-            max = x;
-        }
-    }
+double min, max;
+find_minmax(in.numbers, min, max);
+   // double min = numbers[0];
+   // double max = numbers[0];
+    //for (double x : numbers)
+   // {
+     //   if (x < min)
+      //  {
+      //      min = x;
+      //  }
+      //  else if (x > max)
+      //  {
+      //      max = x;
+      //  }
+   // }
 
     double bin_size = (max - min) / bin_count;