code: Creating a histogram separately

histogram.cpp

@@ -0,0 +1,43 @@
+#include "histogram.h"
+#include <vector>
+#include <iostream>
+
+using namespace std;
+
+static 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 = 0;
+    double max = 0;
+    find_minmax(numbers, min, max);
+    double bin_size = (max - min) / bin_count;
+    vector<size_t> bins(bin_count);
+    for (double number : numbers) {
+        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 <= number) && (number < hi)) {
+                bins[j]++;
+                found = true;
+            }
+        }
+        if (!found) {
+            bins[bin_count - 1]++;
+        }
+    }
+    return bins;
+}

histogram.h

@@ -0,0 +1,9 @@
+#ifndef HISTOGRAM_H_INCLUDED
+#define HISTOGRAM_H_INCLUDED
+
+#include <vector>
+
+std::vector<size_t>
+make_histogram(const std::vector<double>& numbers, size_t& bin_count);
+
+#endif // HISTOGRAM_H_INCLUDED

labor01.cpp

@@ -1,6 +1,8 @@
 #include <iostream>
 #include <vector>
 #include <algorithm>
+#include "histogram.h"
+
 
 using namespace std;
 struct Input {
@@ -26,44 +28,6 @@ input_data() {
     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 = 0;
-    double max = 0;
-    find_minmax(numbers, min, max);
-    double bin_size = (max - min) / bin_count;
-    vector<size_t> bins(bin_count);
-    for (double number : numbers) {
-        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 <= number) && (number < hi)) {
-                bins[j]++;
-                found = true;
-            }
-        }
-        if (!found) {
-            bins[bin_count - 1]++;
-        }
-    }
-    return bins;
-}
-
 void
 show_histogram_text(const vector<size_t>& bins, size_t& bin_count) {
     const size_t SCREEN_WIDTH = 80;
@@ -97,7 +61,6 @@ int main() {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
     show_histogram_text(bins, in.bin_count);
-
 }