more on article

src/core/article.cpp

@@ -16,4 +16,6 @@ bool Article::isSold() { return salePtr_ ? true : false; }
 
 std::string Article::getDescription() { return description_; }
 
-Seller* Article::getSeller() { return sellerPtr_.get(); }
+Seller* Article::getSeller() { return sellerPtr_.get(); }
+
+int Article::getPrice() { return price_; }

src/core/article.h

@@ -9,6 +9,7 @@
 #include <string>
 
 class Seller;
+class Sale;
 
 class Article : public Entity
 {
@@ -24,6 +25,7 @@ class Article : public Entity
 
     std::string getDescription();
     Seller* getSeller();
+    int getPrice();
 
   private:
     std::shared_ptr<Seller> sellerPtr_{};