Question

Suppose the interface and the class of stack already implemented, Write application program to

1- insert 100 numbers to the stack

2- Print the even numbers

3- Print the summation of the odd numbers

Answer 1

Java code

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
        Stack st = new Stack();
        Stack temp = new Stack();
        Scanner scan = new Scanner(System.in);
        int num,sum = 0;
      
        System.out.println("Enter 100 elements in stack");
        for(int i=0;i<100;i++){
            System.out.print("Enter number : ");
            num = scan.nextInt();
            st.push(num);
        }
      
        System.out.println("Even numbers in stack are");
       while(!st.isEmpty()){
            num = st.top();
            st.pop();
          
            if(num % 2 == 0)System.out.println(num);
            sum = sum + num;
            temp.push(num);
       }
      
       while(!temp.isEmpty()){
            st.push(temp.top());
            temp.pop();
       }
      
       System.out.println("Sum of all odd numbers is " + sum);
       scan.close();
   }
}