diff --git a/ArrayLeftRotation.cpp b/Array Left Rotation.cpp
similarity index 90%
rename from ArrayLeftRotation.cpp
rename to Array Left Rotation.cpp
index 36278e1bb..177dada01 100644
--- a/ArrayLeftRotation.cpp
+++ b/Array Left Rotation.cpp	
@@ -6,7 +6,8 @@ int main(){
 	cin>>n;
 	cout<<"Enter Number of indeces u want to rotate the array to left=\t";
 	cin>>k;
-	int a[n];cout<<"Enter  elements of array=\t";
+	int a[n];
+	cout<<"Enter  elements of array=\t";
 	for(int i=0;i<n;i++){
 		cin>>a[i];
 	}
diff --git a/ArrayRightRotation.cpp b/Array Right Rotation.cpp
similarity index 100%
rename from ArrayRightRotation.cpp
rename to Array Right Rotation.cpp
diff --git a/BubbleSort.cpp b/Bubble Sort.cpp
similarity index 100%
rename from BubbleSort.cpp
rename to Bubble Sort.cpp
diff --git a/CircularLinkedList - .cpp b/Circular Linked List.cpp
similarity index 98%
rename from CircularLinkedList - .cpp
rename to Circular Linked List.cpp
index c8b3841a2..bd68043dc 100644
--- a/CircularLinkedList - .cpp	
+++ b/Circular Linked List.cpp	
@@ -92,7 +92,7 @@ int main()
 		switch (choice)
 		{
 			case 1 : 	cout<<"\nEnter the element to be inserted : ";
-					 	cin>>x;;
+					 	cin>>x;
 					 	insert(x);	break;
 			case 2 : 	cout<<"\nEnter the element to be removed : ";
 						cin>>x;
diff --git a/Circular Queue Using Array.cpp b/Circular Queue Using Array.cpp
new file mode 100644
index 000000000..503531e7a
--- /dev/null
+++ b/Circular Queue Using Array.cpp	
@@ -0,0 +1,77 @@
+#include<iostream>
+using namespace std;
+
+int queue[10];
+int front=0;
+int rear=0;
+int count=0;
+
+void push(int x)
+{
+	if(count==10)
+	{
+		cout<<"\nOverflow";
+	}
+	else
+	{
+		queue[rear]=x;
+		rear=(rear+1)%10;
+		count++;
+	}
+}
+
+void pop()
+{
+	if (front==rear)
+	{
+		cout<<"\nUnderflow";
+	}
+	
+	else
+	{
+		cout<<"\n"<<queue[front]<<" deleted";
+		front=(front+1)%10;
+		count--;
+	}
+
+
+}
+
+void show()
+{
+	for (int i = 0; i<count; i++)
+	{
+		cout<<queue[(i+front)%10]<<"\t";
+	}
+}
+
+int main()
+{
+	int ch, x;
+	do
+	{
+		cout<<"\n1. Push";
+		cout<<"\n2. Pop";
+		cout<<"\n3. Print";
+		cout<<"\nEnter Your Choice : ";
+		cin>>ch;
+		if (ch==1)
+		{
+			cout<<"\nInsert : ";
+			cin>>x;
+			push(x);
+		}
+		else if (ch==2)
+		{
+			pop();
+		}
+		else if (ch==3)
+		{
+			show();
+		}
+	}
+	while(ch!=0);
+
+	return 0;
+}
+
diff --git a/decimal_to_binary.cpp b/Decimal To Binary.cpp
similarity index 92%
rename from decimal_to_binary.cpp
rename to Decimal To Binary.cpp
index 340a885cf..3794d2a96 100644
--- a/decimal_to_binary.cpp
+++ b/Decimal To Binary.cpp	
@@ -1,20 +1,20 @@
-#include<iostream>
-using namespace std;
-int main()
-{
-	int number;
-	cin>>number;
-	int remainder,binary=0,var=1;
-
-do{
-		
-	 remainder=number%2;
-	number=number/2;
-	binary=binary+(remainder*var);
-	var=var*10;
-
-
-}
-while(number>0);
-	cout<<binary;
-}
+#include<iostream>
+using namespace std;
+int main()
+{
+	int number;
+	cin>>number;
+	int remainder,binary=0,var=1;
+
+do{
+		
+	 remainder=number%2;
+	number=number/2;
+	binary=binary+(remainder*var);
+	var=var*10;
+
+
+}
+while(number>0);
+	cout<<binary;
+}
diff --git a/DoublyLinkedList.cpp b/Doubly Linked List.cpp
similarity index 98%
rename from DoublyLinkedList.cpp
rename to Doubly Linked List.cpp
index bbc6dfc93..db550d422 100644
--- a/DoublyLinkedList.cpp
+++ b/Doubly Linked List.cpp	
@@ -15,7 +15,7 @@ void insert(int x)
 	node *t=start;
 	if (start!=NULL)
 	{
-			while(t->next!=NULL)
+		while(t->next!=NULL)
 		{
 			t=t->next;
 		}
diff --git a/InsertionSort.cpp b/Insertion Sort.cpp
similarity index 100%
rename from InsertionSort.cpp
rename to Insertion Sort.cpp
diff --git a/LinearSearch.cpp b/Linear Search.cpp
similarity index 100%
rename from LinearSearch.cpp
rename to Linear Search.cpp
diff --git a/LinkedList.cpp b/Linked List.cpp
similarity index 100%
rename from LinkedList.cpp
rename to Linked List.cpp
diff --git a/ListArray.cpp b/List Array.cpp
similarity index 100%
rename from ListArray.cpp
rename to List Array.cpp
diff --git a/Queue Using Array.cpp b/Queue Using Array.cpp
new file mode 100644
index 000000000..e7e2e295d
--- /dev/null
+++ b/Queue Using Array.cpp	
@@ -0,0 +1,78 @@
+#include<iostream>
+using namespace std;
+
+int queue[10];
+int front=0;
+int rear=0;
+
+void push(int x)
+{
+	if(rear==10)
+	{
+		cout<<"\nOverflow";
+	}
+	else
+	{
+		queue[rear++]=x;
+	}
+}
+
+void pop()
+{
+	if (front==rear)
+	{
+		cout<<"\nUnderflow";
+	}
+	
+	else
+	{
+		cout<<"\n"<<queue[front++]<<" deleted";
+		for (int i = front; i < rear; i++)
+		{
+			queue[i-front]=queue[i];
+		}
+		rear=rear-front;
+		front=0;
+	}
+
+
+}
+
+void show()
+{
+	for (int i = front; i < rear; i++)
+	{
+		cout<<queue[i]<<"\t";
+	}
+}
+
+int main()
+{
+	int ch, x;
+	do
+	{
+		cout<<"\n1. Push";
+		cout<<"\n2. Pop";
+		cout<<"\n3. Print";
+		cout<<"\nEnter Your Choice : ";
+		cin>>ch;
+		if (ch==1)
+		{
+			cout<<"\nInsert : ";
+			cin>>x;
+			push(x);
+		}
+		else if (ch==2)
+		{
+			pop();
+		}
+		else if (ch==3)
+		{
+			show();
+		}
+	}
+	while(ch!=0);
+
+	return 0;
+}
+
diff --git a/Queue Using Linked List.cpp b/Queue Using Linked List.cpp
new file mode 100644
index 000000000..067a9c35d
--- /dev/null
+++ b/Queue Using Linked List.cpp	
@@ -0,0 +1,90 @@
+#include<iostream>
+using namespace std;
+
+struct node
+{
+	int val;
+	node *next;
+};
+
+
+node *front, *rear;
+
+
+void push(int x)
+{
+	if (rear==NULL)
+	{
+		node *n= new node;
+		n->val=x;
+		n->next=NULL;
+		rear=n;
+		front=n;
+	}
+
+	else
+	{
+
+		node *n = new node;
+		n->val=x;
+		n->next=NULL;
+		rear->next=n;
+		rear=n;
+	}
+}
+
+void pop()
+{
+	if (rear==front)
+	{
+		cout<<"\nUnderflow";
+	}
+	else
+	{
+		node *t = front;
+		cout<<"\n"<<t->val<<" deleted";
+		front=front->next;
+		delete t;
+	}
+}
+
+void show()
+{
+	node *t=front;
+	while(t!=NULL)
+	{
+		cout<<t->val<<"\t";
+		t=t->next;
+	}
+}
+
+int main()
+{
+	int ch, x;
+	do
+	{
+		cout<<"\n1. Push";
+		cout<<"\n2. Pop";
+		cout<<"\n3. Print";
+		cout<<"\nEnter Your Choice : ";
+		cin>>ch;
+		if (ch==1)
+		{
+			cout<<"\nInsert : ";
+			cin>>x;
+			push(x);
+		}
+		else if (ch==2)
+		{
+			pop();
+		}
+		else if (ch==3)
+		{
+			show();
+		}
+	}
+	while(ch!=0);
+
+	return 0;
+}
+
diff --git a/SelectionSort.cpp b/Selection Sort.cpp
similarity index 100%
rename from SelectionSort.cpp
rename to Selection Sort.cpp
diff --git a/ShellSort.cpp b/Shell Sort.cpp
similarity index 100%
rename from ShellSort.cpp
rename to Shell Sort.cpp
diff --git a/Stack Using Array.cpp b/Stack Using Array.cpp
new file mode 100644
index 000000000..4095c5aed
--- /dev/null
+++ b/Stack Using Array.cpp	
@@ -0,0 +1,68 @@
+#include<iostream>
+using namespace std;
+
+int stack[10];
+int top=0;
+
+void push(int x)
+{
+	if(top==10)
+	{
+		cout<<"\nOverflow";
+	}
+	else
+	{
+		stack[top++]=x;
+	}
+}
+
+void pop()
+{
+	if (top==0)
+	{
+		cout<<"\nUnderflow";
+	}
+	else
+	{
+		cout<<"\n"<<stack[--top]<<" deleted";
+	}
+}
+
+void show()
+{
+	for (int i = 0; i < top; i++)
+	{
+		cout<<stack[i]<<"\n";
+	}
+}
+
+int main()
+{
+	int ch, x;
+	do
+	{
+		cout<<"\n1. Push";
+		cout<<"\n2. Pop";
+		cout<<"\n3. Print";
+		cout<<"\nEnter Your Choice : ";
+		cin>>ch;
+		if (ch==1)
+		{
+			cout<<"\nInsert : ";
+			cin>>x;
+			push(x);
+		}
+		else if (ch==2)
+		{
+			pop();
+		}
+		else if (ch==3)
+		{
+			show();
+		}
+	}
+	while(ch!=0);
+
+	return 0;
+}
+
diff --git a/Stack Using Linked List.cpp b/Stack Using Linked List.cpp
new file mode 100644
index 000000000..753fda8ed
--- /dev/null
+++ b/Stack Using Linked List.cpp	
@@ -0,0 +1,75 @@
+#include<iostream>
+using namespace std;
+
+struct node
+{
+	int val;
+	node *next;
+};
+
+
+node *top;
+
+void push(int x)
+{
+	node *n = new node;
+	n->val=x;
+	n->next=top;
+	top=n;
+}
+
+void pop()
+{
+	if (top==NULL)
+	{
+		cout<<"\nUnderflow";
+	}
+	else
+	{
+		node *t = top;
+		cout<<"\n"<<t->val<<" deleted";
+		top=top->next;
+		delete t;
+	}
+}
+
+void show()
+{
+	node *t=top;
+	while(t!=NULL)
+	{
+		cout<<t->val<<"\n";
+		t=t->next;
+	}
+}
+
+int main()
+{
+	int ch, x;
+	do
+	{
+		cout<<"\n1. Push";
+		cout<<"\n2. Pop";
+		cout<<"\n3. Print";
+		cout<<"\nEnter Your Choice : ";
+		cin>>ch;
+		if (ch==1)
+		{
+			cout<<"\nInsert : ";
+			cin>>x;
+			push(x);
+		}
+		else if (ch==2)
+		{
+			pop();
+		}
+		else if (ch==3)
+		{
+			show();
+		}
+	}
+	while(ch!=0);
+
+	return 0;
+}
+