/* Cyclic rotation of array elements - Program to cyclically rotate elements in array. Program should accept a choice that in which direction to rotate - left or right. Suppose array A contains elements {1,2,3,4,5} and if choice is right then o/p should be {5,1,2,3,4} and if choice is left then o/p should be {2,3,4,5,1}  */

#include  <stdio.h>
#include  <conio.h>

void  main()
{
    int  i, n, t, x[50] ;
    char  choice;
    clrscr() ;
    printf("Enter the number of elements: ") ;
    scanf("%d", &n) ;
    printf("Enter the elements: \n") ;
    for(i=0 ; i<n ; i++)
        scanf("%d", &x[i]) ;
    printf("Do you want to rotate towards right or left ? \n") ;
    printf("Enter R for right and L for left: ") ;
    scanf(" %c", &choice) ;
    printf("Original array is as shown: \n") ;
    for(i=0 ; i<n ; i++)
        printf("%d ", x[i]) ;
    printf("\n") ;
    if(choice=='R'||choice=='r')
        {
            /* Rotating elements to right */
            t=x[n-1] ;
            for(i=n-1 ; i>=1 ; i--)
                x[i]=x[i-1] ;
            x[0]=t ;
        }
    else if(choice=='L'||choice=='l')
        {
            /* Rotating elements to left */
            t=x[0] ;
            for(i=0 ; i<=n-2 ; i++)
                x[i]=x[i+1] ;
            x[n-1]=t ;
        }
    else
        printf("Wrong choice entered. \n") ;
    printf("New array is as shown: \n") ;
    for(i=0 ; i<n ; i++)
        printf("%d ", x[i]) ;
    getch();
}

/*
Output1:

Enter the number of elements: 4
Enter the elements:
5 6 7 8
Do you want to rotate towards right or left ?
Enter R for right and L for left: R
Original array is as shown:
5 6 7 8
New array is as shown:
8 5 6 7

Output2:
Enter the number of elements: 4
Enter the elements:
5 6 7 8
Do you want to rotate towards right or left ?
Enter R for right and L for left: L
Original array is as shown:
5 6 7 8
New array is as shown:
6 7 8 5

Output3:
Enter the number of elements: 3
Enter the elements:
1 2 4
Do you want to rotate towards right or left ?
Enter R for right and L for left: K
Original array is as shown:
1 2 4
Wrong choice entered.
New array is as shown:
1 2 4

*/