Код поделен на функции

main.cpp

@@ -3,51 +3,60 @@
 #include <math.h>
 using namespace std;
 
-int main()
-{
-    //Ââîä
-    size_t number_count;
-    size_t bin_count;
-    float n = 0;
+struct Input {
+    vector<double> numbers;
+    size_t bin_count{};
+    float n;
+};
 
+Input
+input_data() {
+    size_t number_count;
     cerr << "Enter number count: ";
     cin >> number_count;
 
-    vector<double> numbers(number_count);
-
-
-    for (size_t i = 0; i<number_count;i++) {
+    Input in;
+    in.numbers.resize(number_count);
+    for (size_t i = 0; i < number_count; i++) {
         cerr << "Enter number " << i+1 << ": ";
-        cin >> numbers[i];}
+        cin >> in.numbers[i];}
     cerr << "Enter bin count: ";
-    cin >> bin_count;
-
-    if (bin_count==0){
-        bin_count = sqrt(number_count);
-        n = 1;
-        if (bin_count > 25){
-            bin_count = 1 + log2(number_count);
-            n = 2;}}
+    cin >> in.bin_count;
 
-    vector<double> bins(bin_count);
+    in.n = 0;
+    if (in.bin_count==0){
+        in.bin_count = sqrt(number_count);
+        in.n = 1;
+        if (in.bin_count > 25){
+            in.bin_count = 1 + log2(number_count);
+            in.n = 2;}}
 
-    //îáðàáîòêà
+    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;
+    }
+}
+}
 
+vector<size_t>
+make_histogram(const vector<double>& numbers, size_t bin_count){
 
-    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(numbers, min, max);
     double bin_size = (max - min) / bin_count;
+    vector<size_t> bins(bin_count);
 
-    for (size_t i = 0; i < number_count; i++) {
+    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;
@@ -60,9 +69,13 @@ int main()
         if (!found) {
             bins[bin_count - 1]++;
         }
+
     }
+    return bins;
+}
 
-    //Âûâîä
+void
+show_histogram_text(const vector<size_t>& bins, size_t bin_count, float n){
     if (n != 0){
         cout << "bin count = " << bin_count;
         if (n == 1)
@@ -78,5 +91,13 @@ int main()
         for (size_t j = 0; j < bins[i]; j++){
             cout << "*";}
         cout << '\n';}
+}
+int main()
+{
+
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    show_histogram_text(bins, in.bin_count, in.n);
+
     return 0;
 }