LeftRotateArray.cpp

#include <iostream>
#define size 5 // defining Size of the array
using namespace std;

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

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

    cout << "Enter 5 elements array: ";
    for (i = 0; i < size; i++)
    {
        cin >> arr[i];
    }
    cout << "Enter number of times to left rotate: ";
    cin >> num;

    // Actual rotation
    num = num % size;

    // Printing array before rotation
    cout << "Array before rotationn:\n " << endl;
    printArray(arr);

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

    // Printing array after rotation
    cout << "\nArray after rotation: " << endl;
    printArray(arr);

    return 0;
}

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

    // Storing first element of array
    first = arr[0];

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

    // Copying the first element of array to last
    arr[size - 1] = first;
}

// Printing the given array

void printArray(int arr[])
{
    int i;

    for (i = 0; i < size; i++)
    {
        cout << arr[i] << "\t";
    }
}