Программа корректно работает

main.cpp

@@ -1,68 +1,81 @@
 #include <iostream>
 #include <vector>
 using namespace std;
+
 const size_t SCREEN_WIDTH = 80;
 const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
 
-int main()
-{
+struct Input {
+    vector<double> numbers;
+    size_t 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];
+        cin >> in.numbers[i];
     }
 
-    size_t bin_count;
     cerr << "Enter bin count: ";
-    cin >> 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) {
             min = x;
         }
-        else if (x > max) {
+        if (x > max) {
             max = x;
         }
     }
-    vector<size_t> bins(bin_count);
-    double bin_size = (max-min)/bin_count;
-    for (size_t i = 0; i < number_count; 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 ( (numbers[i] >= lo) && (numbers[i] < hi) ) {
-                bins[j]++;
-                found = true;
 }
+
+vector<size_t> make_histogram(const vector<double>& numbers, size_t bin_count) {
+    double min, max;
+    find_minmax(numbers, min, max);
+
+    vector<size_t> bins(bin_count, 0);
+    double bin_size = (max - min) / bin_count;
+
+    for (double number : numbers) {
+        size_t bin_index = bin_count - 1;  // default to last bin
+        if (number < max) {
+            bin_index = static_cast<size_t>((number - min) / bin_size);
         }
-        if (!found) {
-            bins[bin_count-1]++;
+        bins[bin_index]++;
     }
 
+    return bins;
 }
+
+void show_histogram_text(const vector<size_t>& bins) {
     size_t max_count = bins[0];
     for (size_t x : bins) {
         if (x > max_count) {
             max_count = x;
         }
     }
+
     if (max_count > MAX_ASTERISK) {
         for (size_t count : bins) {
             size_t height = MAX_ASTERISK * (static_cast<double>(count) / max_count);
             if (count < 10) {
                 cout << "  " << count << "|";
-            }
-            else if (count < 100){
+            } else if (count < 100) {
                 cout << " " << count << "|";
-            }
-            else{
+            } else {
                 cout << count << "|";
             }
             for (size_t i = 0; i < height; i++) {
@@ -70,16 +83,13 @@ int main()
             }
             cout << "\n";
         }
-    }
-    else{
-        for(double x : bins){
+    } else {
+        for (size_t x : bins) {
             if (x < 10) {
                 cout << "  " << x << "|";
-            }
-            else if (x < 100){
+            } else if (x < 100) {
                 cout << " " << x << "|";
-            }
-            else{
+            } else {
                 cout << x << "|";
             }
             for (size_t i = 0; i < x; i++) {
@@ -88,5 +98,11 @@ int main()
             cout << "\n";
         }
     }
+}
+
+int main() {
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    show_histogram_text(bins);
     return 0;
 }