feat: Create q3 for multi level inheritance

programs/Inheritance/Multilevel Inheritance/q3.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+using namespace std;
+
+// Base class
+class Grandparent
+{
+public:
+    void displayGrandparent()
+    {
+        cout << "This is the Grandparent class." << endl;
+    }
+};
+
+// Derived class from Grandparent
+class Parent : public Grandparent
+{
+public:
+    void displayParent()
+    {
+        cout << "This is the Parent class." << endl;
+    }
+};
+
+// Derived class from Parent
+class Child : public Parent
+{
+public:
+    void displayChild()
+    {
+        cout << "This is the Child class." << endl;
+    }
+};
+
+// Main function
+int main()
+{
+    // Creating an object of the Child class
+    Child obj;
+
+    // Accessing methods from all levels of inheritance
+    obj.displayGrandparent(); // Method from Grandparent class
+    obj.displayParent();      // Method from Parent class
+    obj.displayChild();       // Method from Child class
+
+    return 0;
+}