4. Trace the given program and draw the content of stack step-by-step as the program executes. 1 import java.util.Stack; 2 public class playStack { 30 public static void main(String[] args) { Stacks = new Stack(); int n1, n2; s.push(15); s.push(8); n1 = s.peek() + 2; s.push(n1+6); n2 = s.peek() ; s.push(n1 + n2); n2 = s.peek() ; s.pop(); s.push(13); n1 = s.peek(); s.pop(); while (!s.empty()) { System.out.println (s.peek()); s.pop(); 4567 4 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 } }

4. Trace the given program and draw the content of stack step-by-step as the program executes. 1 import java.util.Stack; 2 public class playStack { 30 public static void main(String[] args) { Stacks = new Stack(); int n1, n2; s.push(15); s.push(8); n1 = s.peek() + 2; s.push(n1+6); n2 = s.peek() ; s.push(n1 + n2); n2 = s.peek() ; s.pop(); s.push(13); n1 = s.peek(); s.pop(); while (!s.empty()) { System.out.println (s.peek()); s.pop(); 4567 4 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 } }

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

4. Trace the given program and draw the content of stack step-by-step as the program executes.
1 import java.util.Stack;
2 public class playStack {
30
4
public static void main(String[] args) {
Stack<Integer>s = new Stack<Integer>();
int n1, n2;
s.push(15);
s.push(8);
8
n1 = s.peek() + 2;
s.push(n1+6);
9
n2 = s.peek() ;
s.push(n1 + n2);
n2 = s.peek() ;
s.pop();
s.push(13);
n1 = s.peek();
s.pop();
while (!s.empty()) {
System.out.println (s.peek());
s.pop();
}
14
18
222
21
}

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