CareerCup

This problem statement can be solved using with Abstract Factory and Strategy Design Pattern.

Find full code in github : gmershad
Sales-Tax

https://github.com/gmershad/Sales-Tax.git

This problem can be solved by Decorator design pattern.

Decorator and Visitor seem relevant here. Decorator looks more suited out of the 2... as type of taxes can vary in nature.

// Abstract class Tax

Class Item {
 String Category; 
 String Name;
 double Price;
 
 public: 
 Item () { Category="default"; Name="item"; Price=0.0; }
 Item (String ct, String nm, double pr) { Category=ct; Name=nm; Price=pr; }

 virtual double getPrice() { return Price;}
 virtual double setPrice(double d) { this.Price = d;}
 
};

 virtual double applyTax (Tax taxType) { };
}; // End of Item class

// Abstract class Tax
class Tax {
	double rate;
	public:
	Tax () { }
	Tax (double rt) { rate = rt;}
	virtual Item getPriceAfterTax(Item& item) {
	 item.setPrice(item.getPrice*(1+(rate/100)));
	return item;
	}
};