feat(ex05): it works

ex05/Harl.cpp

@@ -0,0 +1,62 @@
+#include "Harl.hpp"
+#include <iostream>
+
+typedef void (Harl::*HarlComplaint)(void);
+
+int getLevelIdx(std::string level) {
+  static const std::string levels[] = {
+      "debug",
+      "info",
+      "warning",
+      "error",
+  };
+  for (int i = 0; i < 4; i++) {
+    if (level == levels[i])
+      return i;
+  }
+  return -1;
+}
+
+void Harl::complain(std::string level) {
+  static const HarlComplaint dispatcher[] = {
+      &Harl::debug,
+      &Harl::info,
+      &Harl::warning,
+      &Harl::error,
+  };
+  int idx = getLevelIdx(level);
+  if (idx < 0 || idx > 3)
+    wrongLevel();
+  else {
+    HarlComplaint complaint = dispatcher[idx];
+    (this->*complaint)();
+  }
+}
+
+void Harl::debug() {
+  std::cout
+      << "I love having extra bacon for my "
+         "7XL-double-cheese-triple-pickle-special-ketchup burger. I really do!"
+      << std::endl;
+}
+
+void Harl::info() {
+  std::cout
+      << "I cannot believe adding extra bacon costs more money. You didn’t put "
+         "enough bacon in my burger! If you did, I wouldn’t be asking for more!"
+      << std::endl;
+}
+
+void Harl::warning() {
+  std::cout
+      << "I think I deserve to have some extra bacon for free. I’ve been "
+         "coming for years, whereas you started working here just last month."
+      << std::endl;
+}
+
+void Harl::error() {
+  std::cout << "This is unacceptable! I want to speak to the manager now."
+            << std::endl;
+}
+
+void Harl::wrongLevel() { std::cout << "Wait, I'm confused..." << std::endl; }