Question

9. Predict the output generated at the marked println lines in the following program. The pro- gram makes use of the class Prob1. Please enter each answer in the space provided.

import java.util.Stack; public class Prob1 {

   public static int mystery(int m,
      if(n == 0) return 0;
      if(n % 2 == 0)

         return mystery(m+m, n/2);
      return mystery(m+m, n/2) + m;

}

int n) {

args) {
29)); //------------------(a)

public static void main(String[] System.out.println(mystery(2,

String str = "Harry Potter";
str.toLowerCase();
str.substring(0, 7);
System.out.println(str); //-----------------------------(b)

Stack<Integer> stack = new Stack<>(); int n = 50;
while (n > 0) {

stack.push(n % 2);

n = n/2;

}

while (!stack.isEmpty())
System.out.print(stack.pop()); //--------------------(c)

System.out.println();

} }

(a) What is printed at line (a)?

Answer:

(b) What is the output at (b)?

Answer:

(c) What is printed at line (c)?

Answer:

Answer 1

Code and Answer:-

import java.util.Stack;
public class Prob1 {

   public static int mystery(int m,int n) {
       if(n == 0) return 0;
       if(n % 2 == 0)
           return mystery(m+m, n/2);
       return mystery(m+m, n/2) + m;
   }
   public static void main(String[] args) {
       System.out.println(mystery(2,29));//(a)58
       String str = "Harry Potter";
       str.toLowerCase();
       str.substring(0, 7);
       System.out.println(str); //(b)Harry Potter
       Stack<Integer> stack = new Stack<>();
       int n = 50;
       while (n > 0) {
           stack.push(n % 2);
           n = n/2;
       }
       while (!stack.isEmpty())
           System.out.print(stack.pop()); //(c)110010
           System.out.println();
      
   }
}

Output:-

(a) What is printed at line (a)?

Answer:58

(b) What is the output at (b)?

Answer:Harry Potter

(c) What is printed at line (c)?

Answer:110010

Output On Eclipse IDE:-

Explanation:-

Firstly I predict the answer and verify answer for you ,i have check this program on eclipse IDE.

Thank You Sir/Madam.Have a Great Day!!!!