pac.rar_pac

import java.io.*; import stackp.stacks; import queuep.queue; import java.util.*; public class pac { public static void main(String []args) { int op,ch,c,n,z,x,val; Scanner s = new Scanner(System.in); do { System.out.println("MENU\n 1.stack\n 2.queue\n 3.exit\n enter your option"); op=s.nextInt(); z=1; switch(op) { case 1:System.out.print("stack operations"); System.out.println("\nenter the number of elements in the stack"); n=s.nextInt(); stacks st=new stacks(n); while(z==1) { System.out.println("1.push\n 2.pop\n 3.display\n 4.exit\n enter your option"); ch=s.nextInt(); switch(ch) { case 1:System.out.println("enter element to push"); val=s.nextInt(); st.push(val); break; case 2:st.pop(); break; case 3:st.display(); break; case 4:z=4; break; } } z=1; break; case 2:System.out.print("Queue operations"); System.out.println("\nenter the number of elements in the queue"); n=s.nextInt(); queue q=new queue(n); while(z==1) { System.out.println("\n1.enqueue\n2.dequeue \n3.display\n 4.exit\n enter your option"); c=s.nextInt(); switch(c) { case 1:System.out.println("enter element to enqueue"); x=s.nextInt(); q.enqueue(x); break; case 2:q.dequeue(); break; case 3:q.display(); break; case 4:z=4; break; } } z=1; } }while(op!=3); } }