clock: passes tests, iteration 1 (?)

cpp/clock/clock.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#define EXERCISM_RUN_ALL_TESTS
+
+#include <string>
+
+namespace date_independent {
+
+typedef long  total_t;
+typedef short hours_t;
+typedef short minutes_t;
+
+
+class clock
+{
+    total_t total_minutes_;
+
+public:
+
+    clock(hours_t hours = 0, minutes_t minutes = 0);
+    clock(const clock&) = default;
+    clock &operator=(const clock&) = default;
+
+    bool operator==(const clock&) const;
+    bool operator!=(const clock&) const;
+
+    static clock at(hours_t hours, minutes_t minutes = 0);
+
+    clock plus(minutes_t minutes) const;
+    clock minus(minutes_t minutes) const;
+
+    operator std::string() const;
+};
+
+}