Question

Rewrite Program to store the pairs of states and capitals so that the questions are displayed randomly.

import java.util.*;
public class quiz {

        public static void main(String[] args) {
                Scanner sc=new Scanner(System.in);
                String arr[][]= {{"Alabama","Montgomery"},{"Alaska","Juneau"},{"Arizona","Phoenix"}};
                int n =arr.length;
                int count=0;
                for(int i=0;i<n;i++) {
                        System.out.printf("What is the capital of %s? ",arr[i][0]);
                        String capital=sc.next();
                        if (arr[i][1].equalsIgnoreCase(capital)) {
                                count++;
                                System.out.println("Your answer is correct");
                        }
                        else 
                        {
                                System.out.printf("The correct answer should be %s\n",arr[i][1]);
                        }
                }
                System.out.printf("The correct count is %d",count);
        }

}

Answer 1

Java code screenshot:

Java code:

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String arr[][] = {{"Alabama","Montgomery"},{"Alaska","Juneau"},{"Arizona","Phoenix"}};
        int n = arr.length;
        
        int index[] = new int[n];
        for(int i=0;i<n;i++)
            index[i] = i;
        shuffleIndex(index);
        
        int count = 0;
        for(int i=0;i<n;i++) {
            System.out.printf("What is the capital of %s? ",arr[index[i]][0]);
            String capital=sc.next();
            if (arr[index[i]][1].equalsIgnoreCase(capital)) {
                count++;
                System.out.println("Your answer is correct");
            }
            else 
            {
                System.out.printf("The correct answer should be %s\n",arr[index[i]][1]);
            }
        }
        System.out.printf("The correct count is %d",count);
    }
    
    static void shuffleIndex(int[] index)
    {
        Random rand = new Random();
        int size = index.length;
        for (int i = 0; i < size; i++) {
                        int randomIndex = rand.nextInt(size);
                        int temp = index[randomIndex];
                        index[randomIndex] = index[i];
                        index[i] = temp;
                }
    }
}

Output: