Code: поиск максимума\минимума вынесен в отдельную функцию

main.cpp

@@ -28,11 +28,15 @@ input_data(){
     return in;
 }
 
-int main() {
-    auto in = input_data();
-    auto min = in.numbers[0];
-    auto max = in.numbers[0];
-    for (auto x : in.numbers) {
+void
+find_minmax(const std::vector<double>& numbers, double& min, double& max, bool& res){
+    if (numbers.size() == 0){
+        res = false;
+        return;
+    }
+    min = numbers[0];
+    max = numbers[0];
+    for (auto x : numbers) {
         if (x < min) {
             min = x;
         }
@@ -40,6 +44,18 @@ int main() {
             max = x;
         }
     }
+}
+
+int main() {
+    auto in = input_data();
+    auto min = in.numbers[0];
+    auto max = in.numbers[0];
+    bool res = true;
+    find_minmax(in.numbers, min, max, res);
+    if (res == false){
+        cerr << "Number of elements cannot be equal to zero";
+        exit(1);
+    }
     double bin_size = (max - min) / in.bin_count;
     vector<size_t> bins(in.bin_count);
     for (auto x : in.numbers) {