Question

JAVA

turn this psuedo code into java code.

USING NO LOOPS! ALL LOOPS MUST BE TURNED INTO RECURSIVE CALLS.

English:

1. Prompt for and read a number between 1 and 5. Repeat this step until the input is 1..5.
2. Repeat the following multiple times according to the number read in step 1.

a. Read in a list of integers ending with a 0. The 0 marks the end of the input and is not considered part of the list
b. Print the largest and smallest integers in the list.
c. If only a zero appears in the list, print an error message

Psuedo code:

begin
repeat
prompt user to enter a number from 1 to 5
read number
until number is from 1 to 5

repeat number times
decrement number
read input

if input = 0
print error message
else
set min to input
set max to input
read input
repeat while input is not= 0
if input < min then
set min to input
else
if input > max then
set max to input
end if
end if
read input
end repeat
print max
print min
end if
end repeat
end

Answer 1

import java.util.Scanner;

public class RecursiveCalls {

   /**
   * Finds the min/max of the numbers and returns an array containing min and max
   */
   private static int[] findMinMax(Scanner in, int[] minMax) {
       int num = in.nextInt();
      
       // Check if num is 0
       if (num == 0)
           return minMax;
       else {
           if (num < minMax[0])
               minMax[0] = num;
           else if (num > minMax[1])
               minMax[1] = num;
          
           return findMinMax(in, minMax);
       }
   }
  
   /**
   * Read a list of numbers and finds the min and max
   */
   private static void readList(Scanner in, int times) {
       if (times == 0)
           return;
       else {
           // Read numbers
           System.out.print("Enter a list of numbers(0 to end list): ");
           // Read number
           int input = in.nextInt();
           int[] minMax = new int[2];

           if (input == 0) {
               System.out.println("No numbers in the list");
           } else {
               // Find min from a list of integers
               minMax = findMinMax(in, new int[]{input, input});

               // Display min and max
               System.out.println("Minimum is: " + minMax[0]);
               System.out.println("Maximum is: " + minMax[1]);
           }

           // Read a list of numbers
           readList(in, times - 1);
       }
   }

   /**
   * Reads n(1..5) from the user
   */
   private static void readN(Scanner in) {
       System.out.print("Enter a number from 1 to 5: ");
       int n = in.nextInt();

       if ((1 <= n) && (n <= 5))
           readList(in, n);
       else {
           System.out.println("Invalid input.\n");
           readN(in);
       }
   }

   public static void main(String[] args) {

       // Scanner to get user input
       Scanner in = new Scanner(System.in);

       // Read n from user
       readN(in);

       // Close scanner
       in.close();
   }
}

SAMPLE OUTPUT:

Enter a number from 1 to 5 2 Enter a list of numbers (0 to end list):35-1720 Minimum is: -1 Maximum is: 7 Enter a list of numbers (0 to end list): 10 20 95 2 0 Minimum is: 2 Maximum is: 95