Create abstract_class.cpp

https://www.hackerrank.com/challenges/30-abstract-classes/problem

c++/abstract_class.cpp

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+
+
+// Write your MyBook class here
+
+    //   Class Constructor
+    //   
+    //   Parameters:
+    //   title - The book's title.
+    //   author - The book's author.
+    //   price - The book's price.
+    //
+    // Write your constructor here
+
+
+    //   Function Name: display
+    //   Print the title, author, and price in the specified format.
+    //
+    // Write your method here
+
+// End class
+class MyBook: public Book{
+    int price;
+    public:
+    MyBook(string title, string author, int p):Book(title, author)
+    {
+        price=p;
+    }
+    void display()
+    {
+        cout<<"Title: "<<title<<endl;
+        cout<<"Author: "<<author<<endl;
+        cout<<"Price: "<<price<<endl;
+    }
+};