add: cpp-programming-questions 13_virtual_abstract 06

Author: webwithaman

12_overloading_overriding_constructor_in_inheritance/03_animal.cpp

@@ -20,7 +20,7 @@ class Animal
 };
 
 // // define class Dog by inheriting class Animal
-class Dog
+class Dog : public Animal
 {
 public:
     // // instance member function to produce sound

13_virtual_function_and_abstract_class/00_questions.txt

@@ -14,7 +14,7 @@
 
 05. Design a class hierarchy for a banking system with a base class Account and two derived classes SavingsAccount and CurrentAccount. Each class should have data members for account balance, account number, and an interest rate (for savings account). Implement virtual functions for deposit, withdraw, and display account details. Demonstrate the use of these classes by creating objects and performing transactions.
 
-06. Extend above to display the area of circles. For a circle,only one value is needed i.e. radius but in get_data() function 2 values are passed.
+06. 
 
 07. Create a base class called Matrix. Use this class to store 4 int type values that could be used to calculate determinants and create matrices. Create class
 calculate_determinant which will calculate the determinant of a matrix.Using these classes, calculate the determinant of the matrix.

13_virtual_function_and_abstract_class/06_animal.cpp

@@ -0,0 +1,71 @@
+// // Define a class Animal with a pure virtual function makeSound(). Derive three classes Dog, Cat, and Bird from Animal and implement the makeSound() function in each derived class. Create objects of each class and make them produce sounds.
+
+// // Header files
+#include <iostream>
+#include <conio.h>
+#include <string.h>
+
+// // use namespace
+using namespace std;
+
+// // define an abstract class Animal
+class Animal
+{
+public:
+    // // pure virtual function to be overridden by derived classes
+    virtual void makeSound() = 0;
+};
+
+// // define class Dog by inheriting an abstract class Animal
+class Dog : public Animal
+{
+public:
+    // // override base class function makeSound
+    void makeSound() override
+    {
+        cout << "\nSound of Dog...";
+    }
+};
+
+// // define class Cat by inheriting an abstract class Animal
+class Cat : public Animal
+{
+public:
+    // // override base class function makeSound
+    void makeSound() override
+    {
+        cout << "\nSound of Cat...";
+    }
+};
+
+// // define class Bird by inheriting an abstract class Animal
+class Bird : public Animal
+{
+public:
+    // // override base class function makeSound
+    void makeSound() override
+    {
+        cout << "\nSound of Bird...";
+    }
+};
+
+// // Main Function Start
+int main()
+{
+    // // instance of Dog
+    Dog d1;
+    d1.makeSound();
+
+    // // instance of Cat
+    Cat c1;
+    c1.makeSound();
+
+    // // instance of Bird
+    Bird b1;
+    b1.makeSound();
+
+    cout << endl; // Add new line
+    getch();
+    return 0;
+}
+// // Main Function End