code: модульные заморочки:(

histogram_internal.h

@@ -0,0 +1,4 @@
+#pragma once
+#include <vector>
+
+bool find_minmax(const std::vector <double> &numbers, double &min, double &max);

unittest.cpp

@@ -0,0 +1,52 @@
+#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);
+}
+TEST_CASE("negative numbers")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, -2}, min, max);
+    CHECK(min == -2);
+    CHECK(max == -1);
+}
+TEST_CASE("vector of the same elements")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({3,3,3}, min, max);
+    CHECK(min == 3);
+    CHECK(max == 3);
+
+}
+TEST_CASE("vector of the one elements")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({3}, min, max);
+    CHECK(min == max);
+}
+TEST_CASE("positive and negative numbers")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({-1, 2, 0, -3, 5}, min, max);
+    CHECK(min == -3);
+    CHECK(max == 5);
+}
+TEST_CASE("vector of the 0 elements")
+{
+    double min = 0;
+    double max = 0;
+    find_minmax({ }, min, max);
+    CHECK(!find_minmax({ }, min, max));
+}