Question

u are to write a program in Java that takes two sets of up to 5 symbols(letters, numbers or any characters) and prints the cartesian product of the two sets. The program should allow the user to enter the characters for each set and the output should, consist of the name of each set followed by the characters and on the following line print the cartesian product.

Example:

{1,3,*} X {3,?,D} = {(1,3),(1,?),(1,D),(3,3),(3,?),(3,D,(*,3),(*,?),(*,D)}

or

{2,3,5,7} X (5,6} = {(2,5),(2,6),(3,5),(3,6),(5,5),(5,6),(7,5),(7,6)}

Answer 1

import java.io.*;
import java.util.*;

public class Main {

  
   public static void main (String[] args) {
      
   Scanner s = new Scanner(System.in);
System.out.println("Enter upto 5 Characters only for first array");
char[] array_1 = s.next().toCharArray();
  
System.out.println("Enter upto 5 Characters only for second array");
char[] array_2 = s.next().toCharArray();
      
       int n1 = array_1.length;
       int n2 = array_2.length;
      
       System.out.print("array_1 = ");
       System.out.println( Arrays.toString( array_1 ) );
  
   System.out.print("array_2 = ");
       System.out.println( Arrays.toString( array_2 ) );
      
       System.out.print("array_1 X array_2 = ");
      
       System.out.print("{ ");
      
       for (int i = 0; i < n1; i++)
       for (int j = 0; j < n2; j++)
           System.out.print("{"+ array_1[i]+", "
                           + array_2[j]+"} ");
      
       System.out.print("}");
  
   }
}

Note: While taking input do not put space while typing characters. Just type the number, letters or any other symbol like i have typed in the screenshot. Also, do let me know in the comments if there is any problem while executing the code. I will rectify it with the best of my capability.

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