array_left_rotation_by_d_positions.cpp

#include <bits/stdc++.h>
using namespace std;
 
// Function to rotate array
void Rotate(int arr[], int d, int n)
{
    // Storing rotated version of array
    int temp[n];
 
    // Keeping track of the current index
    // of temp[]
    int k = 0;
 
    // Storing the n - d elements of
    // array arr[] to the front of temp[]
    for (int i = d; i < n; i++) {
        temp[k] = arr[i];
        k++;
    }
 
    // Storing the first d elements of array arr[]
    //  into temp
    for (int i = 0; i < d; i++) {
        temp[k] = arr[i];
        k++;
    }
 
    // Copying the elements of temp[] in arr[]
    // to get the final rotated array
    for (int i = 0; i < n; i++) {
        arr[i] = temp[i];
    }
}
 
// Function to print elements of array
void PrintTheArray(int arr[], int n)
{
    for (int i = 0; i < n; i++) {
        cout << arr[i] << " ";
    }
}
 
// Driver code
int main()
{
    int arr[] = { 1, 2, 3, 4, 5, 6, 7 };
    int N = sizeof(arr) / sizeof(arr[0]);
    int d = 2;
 
    // Function calling
    Rotate(arr, d, N);
    PrintTheArray(arr, N);
 
    return 0;
}