3 files changed, 24 insertions, 22 deletions

diff --git a/week_1/review_program/review_program.cpp b/week_1/review_program/review_program.cpp
index e6efe64..399bf96 100644
--- a/week_1/review_program/review_program.cpp
+++ b/week_1/review_program/review_program.cpp
@@ -27,7 +27,7 @@ void InputToTextbook(Textbook &textbook) {
   textbook.SetIsRequired(
       InputToTextbookValue<bool>("Required (1 = required, 0 = optional)"));
   textbook.SetIsUsed(InputToTextbookValue<bool>("Used (1 = used, 0 = new)"));
-}
+} // void InputToTextbook(Textbook &textbook)
 
 template <typename T> T InputToTextbookValue(const std::string &message) {
   // Helper for repetitive textbook value prompts
@@ -37,7 +37,7 @@ template <typename T> T InputToTextbookValue(const std::string &message) {
   std::cin >> value;
 
   return value;
-}
+} // template <typename T> T InputToTextbookValue(const std::string &message)
 
 void TextbookInputHandler(std::vector<Textbook> &textbooks) {
   // 1. Input textbook
@@ -61,7 +61,7 @@ void TextbookInputHandler(std::vector<Textbook> &textbooks) {
   std::cout << "---" << std::endl;
 
   textbooks.push_back(textbook);
-}
+} // void TextbookInputHandler(std::vector<Textbook> &textbooks)
 
 void FullTextbookPurchaseSummary(const std::vector<Textbook> &textbooks) {
   double total_for_all_books = 0.0;
@@ -75,7 +75,7 @@ void FullTextbookPurchaseSummary(const std::vector<Textbook> &textbooks) {
   std::cout << "\n---\nTotal cost for all books: $" << total_for_all_books
             << std::endl;
   std::cout << "Expected profit: $" << total_for_all_books * 0.2 << std::endl;
-}
+} // void FullTextbookPurchaseSummary(const std::vector<Textbook> &textbooks)
 
 } // namespace wk1_reviewProgram_zSzabatin
 
@@ -95,4 +95,4 @@ int main() {
   wk1_reviewProgram_zSzabatin::FullTextbookPurchaseSummary(textbooks);
 
   return 0;
-}
+} // int main()
diff --git a/week_1/review_program/textbook.cpp b/week_1/review_program/textbook.cpp
index eff0e92..09a43bd 100644
--- a/week_1/review_program/textbook.cpp
+++ b/week_1/review_program/textbook.cpp
@@ -20,7 +20,7 @@ uint64_t Textbook::GetNumberOnHand() const { return this->number_on_hand_; }
 
 uint64_t Textbook::GetProspectiveEnrollment() const {
   return this->prospective_enrollment_;
-}
+} // uint64_t Textbook::GetProspectiveEnrollment() const
 
 bool Textbook::GetIsRequired() const { return this->is_required_; }
 
@@ -35,15 +35,15 @@ void Textbook::SetCode(uint64_t code) { this->code_ = code; }
 
 void Textbook::SetSingleCopyPrice(double single_copy_price) {
   this->single_copy_price_ = single_copy_price;
-}
+} // void Textbook::SetSingleCopyPrice(double single_copy_price)
 
 void Textbook::SetNumberOnHand(uint64_t number_on_hand) {
   this->number_on_hand_ = number_on_hand;
-}
+} // void Textbook::SetNumberOnHand(uint64_t number_on_hand)
 
 void Textbook::SetProspectiveEnrollment(uint64_t prospective_enrollment) {
   this->prospective_enrollment_ = prospective_enrollment;
-}
+} // void Textbook::SetProspectiveEnrollment(uint64_t prospective_enrollment)
 
 void Textbook::SetIsRequired(bool required) { this->is_required_ = required; }
 
@@ -58,14 +58,14 @@ void Textbook::Print() const {
             << "\nEnrollment: " << this->prospective_enrollment_
             << "\nRequired: " << (this->is_required_ ? "Yes" : "No")
             << "\nUsed: " << (this->_is_used ? "Yes" : "No") << std::endl;
-}
+} // void Textbook::Print() const
 
 void Textbook::PrintNeeds() const {
   // Pretty print the amount to order and total cost
   std::cout << "Need to order: " << this->amount_to_order_ << "\nTotal cost: $"
             << std::fixed << std::setprecision(2) << this->total_cost_
             << std::endl;
-}
+} // void Textbook::PrintNeeds() const
 
 // Evaluators
 void Textbook::EvaluateNeeds() {
@@ -95,15 +95,15 @@ void Textbook::EvaluateNeeds() {
       static_cast<double>(this->amount_to_order_) * this->single_copy_price_;
 
   this->total_cost_ = total_cost;
-}
+} // void Textbook::EvaluateNeeds()
 
 // Operator overloads
 bool Textbook::operator==(const Textbook &other) const {
   return this->code_ == other.code_;
-}
+} // bool Textbook::operator==(const Textbook &other) const
 
 bool Textbook::operator!=(const Textbook &other) const {
   return this->code_ != other.code_;
-}
+} // bool Textbook::operator!=(const Textbook &other) const
 
 } // namespace wk1_reviewProgram_zSzabatin
diff --git a/week_1/review_program/textbook.h b/week_1/review_program/textbook.h
index 8bb05d3..e546c14 100644
--- a/week_1/review_program/textbook.h
+++ b/week_1/review_program/textbook.h
@@ -13,17 +13,17 @@ namespace wk1_reviewProgram_zSzabatin {
 class Textbook {
 private:
   // Input values
-  uint64_t code_;
-  double single_copy_price_;
-  uint64_t number_on_hand_;
-  uint64_t prospective_enrollment_;
-  bool is_required_;
-  bool _is_used;
+  uint64_t code_;                   // Book code
+  double single_copy_price_;        // Price of a single copy
+  uint64_t number_on_hand_;         // Number of copies on hand
+  uint64_t prospective_enrollment_; // Number of students expected to enroll
+  bool is_required_;                // Is the book required?
+  bool _is_used;                    // Is the book used?
   // Fix 6 byte misalignment
   const char PADDING[6] = {0};
   // Evaluated values
-  uint64_t amount_to_order_ = {0};
-  double total_cost_ = {0};
+  uint64_t amount_to_order_ = {0}; // Number of copies to order
+  double total_cost_ = {0};        // Total cost of the order
 
 public:
   // Constructors
@@ -67,6 +67,8 @@ public:
   void SetIsUsed(bool);
 
   // Procedures
+  /// Precondition: Values have been set: code_, single_copy_price_,
+  /// number_on_hand_, prospective_enrollment_, is_required_, _is_used
   void EvaluateNeeds();
 
   // Printers