Matrix Interchange

Working with 2D arrays is quite important. Here we will do swapping of columns in a 2D array. You are given a matrix arr[][] of r rows and c columns. You need to swap the first column with the last column.

Example:

Input:
r = 3
c = 4
arr[][] = {{1, 2, 3, 4},
           {4, 3, 2, 1},
           {6, 7, 8, 9}}
Output:
4 2 3 1
1 3 2 4
9 7 8 6

 

Your Task:
Since this is a function problem, you don't need to take any input. Just complete the provided function interchange() that take rows and columns number as parameter. In a new line, print the modified matrix.



class Solution:

    def interchange(self,matrix,r,c):

        self.matrix=matrix

        self.r=r

        self.c=c

        arr=matrix

        for i in range(r):

            arr[i][0],arr[i][c-1]=arr[i][c-1],arr[i][0]

        for i in range(r):

            for j in range(c):

                print(arr[i][j],end=" ")

            print()

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