code: Structuring a program using function

labor01.cpp

@@ -3,28 +3,37 @@
 #include <algorithm>
 
 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{};
+};
+
+Input
+input_data() {
     size_t number_count;
     cerr << "Enter number count: ";
     cin >> number_count;
-    vector<double> numbers(number_count);
-    cerr << "Enter numbers:";
-    for (int i = 0; i < number_count; i++) {
-        cin >> numbers[i];
+    Input in;
+    in.numbers.resize(number_count);
+    for (size_t i = 0; i < number_count; i++) {
+        cin >> in.numbers[i];
     }
-    sort(begin(numbers), end(numbers));
-    numbers.erase(unique(begin(numbers), end(numbers)), end(numbers));
-    number_count = numbers.size();
-  
-    size_t bin_count;
     cerr << "Enter bin count: ";
-    cin >> bin_count;
-    vector<size_t> bins(bin_count);
-    double min = numbers[0];
-    double max = numbers[0];
-    for (double x : numbers) {
+    cin >> in.bin_count;
+    sort(begin(in.numbers), end(in.numbers));
+    in.numbers.erase(unique(begin(in.numbers), end(in.numbers)), end(in.numbers));
+    number_count = in.numbers.size();
+    return in;
+}
+
+int main() {
+    Input in = input_data();
+    const size_t SCREEN_WIDTH = 80;
+    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
+    vector<size_t> bins(in.bin_count);
+    double min = in.numbers[0];
+    double max = in.numbers[0];
+    for (double x : in.numbers) {
         if (x < min) {
             min = x;
         }
@@ -33,21 +42,21 @@ int main() {
         }
     }
     size_t max_count = 0;
-    double bin_size = (max - min) / bin_count;
+    double bin_size = (max - min) / in.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++) {
+        for (size_t j = 0; (j < in.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)) {
+            if ((lo <= in.numbers[i]) && (in.numbers[i] < hi)) {
                 bins[j]++;
                 found = true;
             }   
         }
         if (!found) {
-            bins[bin_count - 1]++;
+            bins[in.bin_count - 1]++;
         }
-        for (size_t i = 0; i < bin_count; i++) {
+        for (size_t i = 0; i < in.bin_count; i++) {
             if (bins[i] > max_count) {
                 max_count = bins[i];
             }