TOPIC REVERSE POLISH (HP) STYLE CALCULATOR - PART 2

package TestArraystack; import java.util.Scanner; import Arraystack.ArrayStack; public class TestArrayStack { public static void main(String [] args) { int choice; int pek; double val,poped; boolean empty; Scanner sc =new Scanner(System.in); ArrayStack as = new ArrayStack(20); while(true){ System.out.println("1. Enter a Value in stack"); System.out.println("2. Pop a Value"); System.out.println("3. Check If array is Empty"); System.out.println("4. Peek Function"); System.out.println("5. Exit\n"); choice = sc.nextInt(); switch(choice) { case 1: System.out.print("Enter a value To push : "); val = sc.nextDouble(); as.push(val); break; case 2: poped = as.pop(); System.out.println("Popped : "+poped); break; case 3: empty = as.isEmpty(); System.out.println("Empty ? "+empty); break; case 4: System.out.print("Enter a index to peek : "); pek = sc.nextInt(); poped = as.peek(pek); if(poped != -1) System.out.println("Peeked Value : "+poped); else System.out.println("Oops it was not a valid index this place is empty"); break; case 5: System.exit(0); } } } }