Virtual Inheritence to solve Diamond problem

Author: anishsingh20

Data Structures/Queues/circularArrayQueue.cpp

@@ -49,7 +49,7 @@ void Queue::Enqueue(int n ) {
 
 	else if(isEmpty()) {
 
-	front=rear=0;
+	front=rear=0; //make a new cell for adding element
 
 	} //array is empty then generate a new cell to insert
 

VirtualInheritenceAndDiamondProblem.cpp

@@ -0,0 +1,63 @@
+#include<iostream>
+
+using namespace std;//std namespace is assigned as global namesapace
+
+//SOLVING DIAMOND PROBLEM  using VIRTUAL INHERITENCE 
+
+
+class Animal{
+	public:
+		Animal() {
+			cout<<"Animal constructor called"<<endl;
+		}
+		void getAnimal() {
+			cout<<"hello I am animal"<<endl;
+		}
+}; 
+
+class Tiger : virtual public Animal{
+	public:
+		Tiger() {
+			cout<<"Tiger constructor called"<<endl;
+		}
+};
+
+
+class Lion : virtual public Animal{
+	public:
+		Lion() {
+			cout<<"Lion constructor called"<<endl;
+		}
+};
+
+
+class Liger:  public Tiger, public Lion {
+	public:
+		Liger() {
+			cout<<"Liger constructor called"<<endl;
+		}
+};
+
+
+int main() {
+	Liger l; 
+	l.getAnimal(); //error if virtual inheritence is not used-'getAnimal' is ambiguous, as compiler will not know from which instance of Tiger or Lion will be used to call
+	//getAnimal() of Animal class
+	
+	// when virtual inheritence is not used- 
+	//1)ANIMAL constructor called using Tiger's object2) TIGER Constructor called 3)Again Animal constructor called using LION's object 
+	//4)Lion constructor called 5)Liger constructor called at last
+//this happens because Liger class inherits from both Tiger and Lion class, so compiler will use the instances(objects) of both Tiger and Lion to call constructor of Animal
+	
+	
+	//------------when Virtual inheritence is used----------------------- 
+	//1) Animal constructor called
+	//2)Tiger constructor called
+	//3) Lion constructor called
+	//4) Liger constructor called
+	
+//This happens because compiler creates only one instance(object) of Tiger or Lion class and uses it to call constructor of Animal, 2 instances of Tiger and Lion are not created
+//when using virtual inheritence
+
+	return 0;
+}

VowelsorNotusingPointer.cpp

@@ -8,6 +8,8 @@ int main() {
 
 	char *ptr;
 	char name[100];
+	//arrays are always autmoatically passed by reference
+	
 	ptr = name; //ptr now stores address of name array, array's label itself acts as an address of the array
 	int countv=0,countc=0;