Question

A class Trans is defined to find the transpose of a square matrix. A transpose of a matrix is obtained by interchanging the elements of the rows and columns.

Example: If size of the matrix = 3, then

ORIGINAL
11	5	7
8	13	9
1	6	20

TRANSPOSE
11	8	1
5	13	6
7	9	20

Some of the member of the class are given below:

Class name	Trans
Data members/instance variables:
arr[ ] [ ]	to store integers in the matrix
m	integer to store the size of the matrix
Methods/Member functions:
Trans(int mm)	parameterised constructor to initialise the data member m = mm
void fillarray( )	to enter integer elements in the matrix
void transpose( )	to create the transpose of the given matrix
void display( )	displays the original matrix and the transposed matrix by invoking the method transpose( )

Specify the class Trans giving details of the constructor( ), void fillarray( ), void transpose( ) and void display( ). Define a main ( ) function to create an object and call the functions accordingly to enable the task.

Answer 1

import java.util. Scanner;
public class Trans
{
   int arr[][];
   int arrT[][];
   static int m;
   public Trans(int mm)
   {
       m=mm;
       arr=new int[m][m];
       arrT=new int{m][m];
}
public void fillarray()
{
int i, j;
System.out.println(“Enter elements :");
Scanner s =new Scanner(System.in);
for(i =0; i <m; i++)
{
    for(j=0; j <m; j++)
       {
          arr[i][j]=s.nextInt();
       System.out.print(" “);
       }
   }
}
public void transpose()
{
    for(int i =0; i <m; i++)
       {
       for(int j =0; j <m; j++)
       {
          arrT[i][j]=arr[j](i];
      }
         }
}
public void display()
{
  int i,j;
  System.out.println(“Before Transpose : “);
       for(i =0; i <m; i++)
      {
      for(j =0; j <m; j++)
     {
          System.out.print(arr[i][j]+” “);
      }
 System.out.println(" “);
}
transpose();
System.out.printin(“After Transpose : “);
     for(i =0;i <m; i++)
    {
    for(j =0;j <m; j++)
   {
   System.out.print(arrT[i][j}+” “);
   }
System.out.println(” “);
 }
}
public static void main(String args[])
{
    Scanner s =new Scanner(System.in);
  System.out.println(“Enter number of rows/cols ");
  m=s.nextInt();
  Trans ob=new Trans(m);
  ob.fillarray();
  ob.display();
}
}