code: первый unittest

histogram.cpp

@@ -3,7 +3,6 @@
 
 using namespace std;
 
-static
 void
 find_minmax(const vector<double>& numbers, double& min, double& max) {
     min = numbers[0];
@@ -18,7 +17,7 @@ find_minmax(const vector<double>& numbers, double& min, double& max) {
     }
 }
 
-vector <double> make_histogram(const vector<double> numbers, size_t bin_count){
+vector <double> make_histogram(const vector<double>& numbers, size_t bin_count){
 
     double min, max;
     find_minmax(numbers, min, max);

histogram.h

@@ -1,5 +1,5 @@
 #ifndef HISTOGRAM_H_INCLUDED
 #define HISTOGRAM_H_INCLUDED
-std::vector<size_t>
+std::vector<double>
 make_histogram(const std::vector<double>& numbers, const std::size_t bin_count);
 #endif // HISTOGRAM_H_INCLUDED

histogram_internal.h

@@ -0,0 +1,7 @@
+#ifndef HISTOGRAM_INTERNAL_H_INCLUDED
+#define HISTOGRAM_INTERNAL_H_INCLUDED
+
+void
+find_minmax(const std::vector<double>& numbers, double& min, double& max);
+
+#endif // HISTOGRAM_INTERNAL_H_INCLUDED

main.cpp

@@ -1,11 +1,10 @@
 #include <iostream>
 #include <vector>
 #include "histogram.h"
+#include "text.h"
 
 using namespace std;
 
-const int max_length = 80;  // ìàêñèìàëüíàÿ äëèíà
-const int indent = 4;       // îòñòóï
 
 struct Input {
     vector<double> numbers;
@@ -28,45 +27,12 @@ input_data() {
     return in;
 }
 
-void show_histogram(const vector<double> bins, size_t bin_count){
-double max_bin = bins[0];
-    int k;
-    for (size_t i = 0; i < bin_count; i++) {             // íàõîæäåíèå ìàêñ çíà÷åíèÿ bin[]
-        if (bins[i] > max_bin) {
-            max_bin = bins[i];
-        }
-    }
-    if (max_bin <= (max_length - indent)) {           // ñðàâíåíèå äëèíû ñòðîêè "*" ñ ìàêñèìàëüíîé äëèíîé âûâîäèìîé ñòðîêè
-        k = 0;
-    }
-    else {
-        k = 1;
-    }
-
-    cerr << endl;
-    int out;
-    for (size_t i = 0; i < bin_count; i++) {
-        cout.width(3);                                          // âûðàâíèâàíèå
-        cout.fill(' ');
-        cout << bins[i] << "|";
-        if (k == 0) {                                           // ìàñøòàáèðîâàíèå
-            out = bins[i];                                      // îáû÷íûé âûâîä
-        }
-        else {
-            out = bins[i] * (max_length - indent) / max_bin;    // ìàñøòàáèðîâàííûé âûâîä
-        }
-        for (int j = 0; j < out; j++) {
-            cout << "*";
-        }
-        cout << endl;
-    }
-}
 
 int
 main()
 {
     auto in = input_data();
     auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram(bins, in.bin_count);
+    show_histogram_text(bins, in.bin_count);
     return 0;
 }

unittest.cpp

@@ -0,0 +1,12 @@
+#define DOCTEST_CONFIG_NO_MULTITHREADING
+#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+#include "doctest.h"
+#include "histogram_internal.h"
+
+TEST_CASE("distinct positive numbers") {
+    double min = 0;
+    double max = 0;
+    find_minmax({1, 2}, min, max);
+    CHECK(min == 1);
+    CHECK(max == 2);
+}