code: код разделен на функции

main.cpp

@@ -3,25 +3,31 @@
 
 using namespace std;
 
-int main()
-{
-    const size_t SCREEN_WIDTH = 80;
-    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+struct Input {
+    vector<double> numbers;
+    size_t bin_count{};
+};
 
-    size_t number_count, bin_count;
+Input
+input_data() {
+    size_t number_count;
     cerr << "Enter number count: ";
     cin >> number_count;
-    vector<double> numbers(number_count);
+    Input in;
+    in.numbers.resize(number_count);
     cerr << "Enter numbers: ";
-    for (size_t i = 0; i < number_count; i++){
-        cin >> numbers[i];
+    for (size_t i = 0; i < number_count; i++) {
+        cin >> in.numbers[i];
     }
     cerr << "Enter bin count: ";
-    cin >> bin_count;
-    vector<size_t> bins(bin_count);
+    cin >> in.bin_count;
+    return in;
+}
 
-    double min = numbers[0];
-    double max = numbers[0];
+void
+find_minmax(const vector<double>& numbers, double& min, double& max) {
+    min = numbers[0];
+    max = numbers[0];
 
     for (double x : numbers) {
         if (x < min) {
@@ -31,6 +37,14 @@ int main()
             max = x;
         }
     }
+}
+
+vector<size_t>
+make_histogram(const vector<double>& numbers, size_t bin_count){
+    size_t number_count = numbers.size();
+    vector<size_t> bins(bin_count);
+    double min, max;
+    find_minmax(numbers, min, max);
 
     double bin_size = (max - min) / bin_count;
 
@@ -48,6 +62,15 @@ int main()
             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;
+
+    auto bin_count = bins.size();
 
     size_t max_count = 0;
     for (size_t i = 0; i < bin_count; i++){
@@ -56,7 +79,6 @@ int main()
             max_count = Count;
         }
     }
-
     if (max_count <= MAX_ASTERISK){
         for (size_t i = 0; i < bin_count; i++){
             size_t Count = bins[i];
@@ -90,5 +112,12 @@ int main()
             cout << "\n";
         }
     }
-    return 0;
+}
+
+
+int
+main() {
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    show_histogram_text(bins);
 }