net weights implementation WIP

goods/goods.h

@@ -7,17 +7,20 @@ class Goods
 {
     std::string name;
     double quantity; // by weight or by the piece
+    std::string net_weight; // will contain values like "5мл" or "10г"
     double price_per_unit;
 public:
-    Goods(std::string, double, double);
+    Goods(std::string name, double quantity, std::string net_weight, double price_per_unit);
     double calculate_total_price();
 
     std::string get_name();
     double get_quantity();
+    std::string get_net_weight();
     double get_price_per_unit();
 
     void set_name(std::string);
     void set_quantity(double);
+    void set_net_weight(std::string);
     void set_price_per_unit(double);
 };