phone_number: ...

cpp/phone-number/phone_number.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <string>
+
+class phone_number
+{
+    std::string area_code_;
+    std::string number_;
+
+public:
+
+    phone_number(const std::string&);
+
+    std::string number() const;
+    std::string area_code() const;
+
+    operator std::string() const;
+};