code: make histogram

main.cpp

@@ -3,8 +3,9 @@
 
 using namespace std;
 
-     void
-    find_minmax(vector<double> numbers, double& min, double& max) {
+void
+find_minmax(const vector<double> numbers, double& min, double& max)
+{
     min = numbers[0];
     max = numbers[0];
     size_t number_count = numbers.size();
@@ -20,41 +21,88 @@ using namespace std;
         }
     }
 }
- 
-	 
-	struct Input {
+
+
+
+struct Input
+{
     vector<double> numbers;
     size_t bin_count{};
 };
-    Input
-    input_data()
+
+
+
+
+
+Input
+input_data()
 {
-	size_t number_count;
-cin >> number_count;
-    
+    size_t number_count;
+    cin >> number_count;
 
-vector<double> numbers(number_count);
-for (size_t i = 0; i < number_count; i++) {
-    cin >> numbers[i];
-}
 
-size_t bin_count;
-cin >> bin_count;
+    vector<double> numbers(number_count);
+    for (size_t i = 0; i < number_count; i++)
+    {
+        cin >> numbers[i];
+    }
 
-Input in;
+    size_t bin_count;
+    cin >> bin_count;
+
+    Input in;
     in.numbers.resize(number_count);
-    
-        for (size_t i = 0; i < number_count; i++) {
+
+    for (size_t i = 0; i < number_count; i++)
+    {
         cin >> in.numbers[i];
     }
-     cin >> in.bin_count;
-     return in;
+    cin >> in.bin_count;
+    return in;
 
 }
 
+
+
+vector<size_t>
+make_histogram(vector<double> numbers, size_t bin_count)
+{
+
+    double min, max;
+    vector<size_t> bins(bin_count);
+    double bin_size = (max - min) / bin_count;
+    find_minmax(numbers, min, max);
+    size_t number_count = numbers.size();
+
+    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 ((lo <= numbers[i]) && (numbers[i] < hi))
+            {
+                bins[j]++;
+                found = true;
+            }
+        }
+        if (!found)
+        {
+            bins[bin_count - 1]++;
+        }
+    }
+}
+
+
+
+
+
+
 int main()
 {
-   
-    Input in = input_data();
 
+    auto in = input_data();
+    auto bins = make_histogram(in.numbers, in.bin_count);
+    //show_histogram_text(bins, ...);
 }