Write C program to right rotate an array

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YasminRadwan26

2022-05-07

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#include <stdio.h>
#define size 5 // Declaring Size of the array

void printArray(int arr[]);
void rotateByOne(int arr[]);


int main()
{
    int i, num;
    int arr[size];

    printf("Enter 5 elements array: ");
    for(i=0; i<size; i++)
    {
        scanf("%d", &arr[i]);
    }
    printf("Enter number of times to right rotate: ");
    scanf("%d", &num);

    // Actual rotation
    num = num % size;

    // Printing array before rotation
    printf("Array before rotationn");
    printArray(arr);

    // Rotate array n times
    for(i=1; i<=num; i++)
    {
        rotateByOne(arr);
    }

    // Printing array after rotation
    printf("\n\nArray after rotation\n");
    printArray(arr);

    return 0;
}


void rotateByOne(int arr[])
{
    int i, last;

    // Storing last element of array
    last = arr[size - 1];

    for(i=size-1; i>0; i--)
    {
        // Moving each array element to its right
        arr[i] = arr[i - 1];
    }

   // Copying last element of array to first
    arr[0] = last;
}


//Printing the given array
void printArray(int arr[])
{
    int i;

    for(i=0; i<size; i++)
    {
        printf("%d ", arr[i]);
    }
}

Result:

Enter 5 elements array: 1

Enter number of times to right rotate: 2

Array before rotationn1 2 3 4 5

Array after rotation

4 5 1 2 3

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Write C program to right rotate an array

Write C program to right rotate an array

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Result:

C language array programs with an examples

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