Java Programming. Write your own source code with comments. (Latin square) A Lat

Question

Java Programming. Write your own source code with comments.

(Latin square) A Latin square is an n-by-n array filled with n different Latin letters, each occurring exactly once in each row and once in each column. Write a program that prompts the user to enter the number n and the array of characters, as shown in the sample output, and checks if the input array is a Latin square.
The characters are the first n characters starting from A .
Enter number n: 4
Enter 4 rows of letters separated by spaces:
A B C D
B A D C
C D B A
D C A B
The input array is a Latin square
Enter number n: 3
Enter 3 rows of letters separated by spaces:
A F D
Wrong input: the letters must be from A to C

Explanation / Answer

Solution for Problem(in Java) :-

Program :-

import java.util.Scanner;
class LatinLetter
{
   public static void main(String args[])
   {
       int n,m,flag=1;
       Scanner in=new Scanner(System.in);
       System.out.println("Enter number n :- ");
       n=in.nextInt();
       char array[][]=new char[n][n];
       System.out.println("Enter "+n+" rows of letters starting from A ");
       for(int i=0;i<n;i++)
       {
           for(int j=0;j<n;j++)
           {
               array[i][j]=in.next().charAt(0);
           }
       }
       System.out.println("Enter input array size m :- ");
       m=in.nextInt();
       char inputArray[]=new char[m];
       System.out.println("Enter "+m+" letters :-");
       for(int i=0;i<m;i++)
       {
           inputArray[i]=in.next().charAt(0);
       }
       int letterSize='A'+m-1;
       char last=(char) letterSize;
       for(int i=0;i<m;i++)
       {
               if(inputArray[i]>='A' && inputArray[i]<=last)
               {
                   //System.out.println(inputArray[i]);
               }
               else
               {
                   flag=0;
                   break;
               }
       }
       if(flag==0)
           System.out.println("Wrong input: the letters must be from A to "+last);
       else
           System.out.println("Right input: the word is Lattin Square");
      
      
   }
}

Sample Output 1;-

Enter number n :-

4
Enter 4 rows of letters starting from A

A B C D
B C D A
C D A B
D A B C
Enter input array size m :-
3
Enter 3 letters :-
A F D
Wrong input: the letters must be from A to C

Sample Output 2 :-

Enter number n :-
3
Enter 3 rows of letters starting from A

A B C
B C A
C A B
Enter input array size m :-
3
Enter 3 letters :-
A B C
Right input: the word is Lattin Square

Note :- As per your question checks if the input array is a Latin square. As per your output it printf Wrong input: the letters must be from A to n. Else the program prints Right input: the word is Lattin Square

Thank you!

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