assignment 6 added

Semester 2 (DSA)/assignment 6/Node.java

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+public class Node
+{
+	int info;
+	Node next;
+	Node(int info)
+	{
+		this.info=info;
+	}
+}

Semester 2 (DSA)/assignment 6/part1.java

@@ -0,0 +1,91 @@
+import java.util.*;
+public class part1
+{
+	public static final int MAX=10;
+	public static void main(String args[])
+	{
+		Scanner in = new Scanner(System.in);
+		int stack[] = new int[MAX];
+		int top=-1;
+		while(true)
+		{
+			System.out.println("***MENU***");
+			System.out.println("0: Exit");
+			System.out.println("1: Push");
+			System.out.println("2: Pop");
+			System.out.println("3: Display");
+			System.out.println("Enter your choice");
+			int choice=in.nextInt();
+			switch(choice)
+			{
+				case 0:
+					System.out.println("Exiting Program");
+					System.exit(0);
+					break;
+				case 1:
+					top=push(stack,top);
+					break;
+				case 2:
+					top=pop(stack, top);
+					break;
+				case 3:
+					display(stack, top);
+					break;
+				default:
+				System.out.println("Invalid choice");	
+			}
+		}
+	}
+	public static int push(int S[], int top)
+	{
+		if(isFull(top))
+		{
+			System.out.print("Error : Stack OverFlow");
+			return top;
+		}
+		else
+		{
+			top++;
+			Scanner in = new Scanner(System.in);
+			System.out.print("Enter the Element to Push : ");
+			S[top]=in.nextInt();
+			return top;
+		}
+	}
+	public static int pop(int S[], int top)
+	{
+		if(isEmpty(top))
+		{
+			System.out.println("Error : Stack UnderFlow");
+			return top;
+		}
+		else
+		{
+			top--;
+			return top;
+		}
+	}
+	public static void display(int S[], int top)
+	{
+		if(isEmpty(top))
+		{
+			System.out.println("Stack Empty");
+		}
+		else
+		{
+			System.out.println("Elements in the stack");
+			for(int i=0; i<=top; i++)
+			{
+				System.out.println(S[i]);
+			}
+		}
+	}
+	public static boolean isFull(int top)
+	{
+		return MAX-1==top;
+	}
+	public static boolean isEmpty(int top)
+	{
+		return top==-1;
+	}
+}

Semester 2 (DSA)/assignment 6/part2.java

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+import java.util.*;
+public class part2
+{
+	public static void main(String args[])
+	{
+		Scanner in = new Scanner(System.in);
+		Node top=null;
+		while(true)
+		{
+			System.out.println("****MENU****");
+			System.out.println("0:Exit");
+			System.out.println("1:Push");
+			System.out.println("2:Pop");
+			System.out.println("3:Display");
+			System.out.println("Enter your choice");
+			int choice=in.nextInt();
+			switch(choice)
+			{
+				case 0:
+					System.out.println("Exiting Program");
+					System.exit(0);
+					break;
+				case 1:
+					top=push(top);
+					break;
+				case 2:
+					top=pop(top);
+					break;
+				case 3:
+					display(top);
+					break;
+				default:
+				System.out.println("Wrong choice");
+			}
+		}
+	}
+	public static Node push(Node top)
+	{
+		Scanner in = new Scanner(System.in);
+		System.out.print("Enter the Value to Push :");
+		Node n = new Node(in.nextInt());
+		n.next=top;
+		top=n;
+		return top;
+	}
+	public static Node pop(Node top)
+	{
+		if(top==null)
+		{
+			System.out.println("Error : Stack UnderFlow");
+			return null;
+		}
+		else
+		{
+			Node n=top;
+			n=n.next;
+			return n;
+		}
+	}
+	public static void display(Node top)
+	{
+		if(top==null)
+		{
+			System.out.println("Stack Empty");
+		}
+		else
+		{
+			System.out.println("Elements of Stack");
+			Node n=top;
+			while(n!=null)
+			{
+				System.out.println(n.info);
+				n=n.next;
+			}
+		}
+	}
+}