Matrix Rotate Problem !!!

PROBLEM 49: Matrix Rotate Problem

A program to rotate a square matrix by 90° anti-clockwise direction. (Interview Question)

(For best view experience, view in windows version)

Author : Ajay Zad

Date    : 19/04/2022

#include<stdio.h>

void main()

{

        int i,j,r,c,m,n;

        printf("Enter the size for Row :");

        scanf("%d",&r);

        

        printf("Enter the size for Column :");

        scanf("%d",&c);

        

        int matrix1[r][c],matrix2[r][c];

        

        printf("Enter the elements in the matrix :\n");

        for(i = 0 ; i < r ; i++)

        {

            for(j = 0 ; j < c ; j++)

            {

                scanf("%d",&matrix1[i][j]);

            }

        }

        

        printf("\n\n");

        

        for(i = 0 ; i < r ; i++)

        {

            for(j = 0 ; j < c ; j++)

            {

                matrix2[i][j] = matrix1[j][i];

            }

        }

        

        m = 0;

        for(i = (r-1); i >= 0 ; i--)

        {

            n = 0;

            for( j = 0 ; j < c ; j++)

            {

                matrix1[m][n] = matrix2[i][j];

                n++;

            }

            m++;

        }

       printf("Matrix after 90 degree's rotation : \n"); 

        for(i = 0 ; i < r ; i++)

        {

            for(j = 0 ; j < c ; j++)

            {

                printf("%d\t",matrix1[i][j]);

            }

            printf("\n");

        }

        

}

The above code is in C language. 

Output :

Enter the size for Row : 3

Enter the size for Column : 3

Enter the elements in the matrix :

1

2

3

4

5

6

7

8

9

The original form of the matrix will be as follow :

1    2    3

4    5    6

7    8    9

Matrix after 90 degree's rotation :

3    6    9

2    5    8

1    4    7

 

Array Rotate Problem !!!

 PROBLEM 48: Array Rotate 

A program to rotate 'N' number of elements in an array depending on the size of the rotate. Rotation to be considered from both the ends of an array. (Without using Built-in functions) (INTERVIEW QUESTION)

(For best view experience, view in windows version)

Author - Ajay Zad

Date     - 08/04/2022

n = int(input("Enter the size of the array :"))

m = int(input("Enter the size of rotation :"))

l = []

for i in range(0,n):

        a = int(input("Enter the elements in the array :"))

        l.append(a)

x = 1

while x == 1:

        d = input("Enter the direction for rotation Right(r) or Left(l):")

        if d == 'l':

            l2 = list(l)        

            j = 1

            for i in range(m-1,-1,-1):

                l2[n-j] = l[i]   

                j = j + 1

            j = 0

            for i in range(m,n):

                 l2[j] = l[m+j]

                 j = j + 1

            print(l2)

            l = l2[:]        

        elif d == 'r':

            l2 = list(l)

            j = 0

            for i in range(m-1,-1,-1):

                l2[i] = l[n-(j+1)]

                j = j + 1

            j = 0

            for i in range(m,n):

                l2[m+j] = l[j]

                j = j + 1

            print(l2)

            l = l2[:]

        else:

            print("Enter the correct option")

        x = int(input("Enter 1 to continue or press any other number to exit: "))

   

The above code is in Python language.

Input:

Enter the size of the array : 8

Enter the size of rotation   : 4

Enter the elements in the array : 1

Enter the elements in the array : 2

Enter the elements in the array : 3

Enter the elements in the array : 4

Enter the elements in the array : 5

Enter the elements in the array : 6

Enter the elements in the array : 7

Enter the elements in the array : 8

Enter the direction for rotation Right(r) or Left(l): l

[5, 6, 7, 8, 1, 2, 3, 4]

Enter 1 to continue or press any other number to exit: 1

Enter the direction for rotation Right(r) or Left(l): r

[1, 2, 3, 4, 5, 6, 7, 8]

Enter 1 to continue or press any other number to exit: 2