Rotate an Array by n 

#include <iostream>
using namespace std;

void leftRotatebyOne(int arr[], int n) 
{ 
    int temp = arr[0], i; 
    for (i = 0; i < n - 1; i++) 
        arr[i] = arr[i + 1]; 
  
    arr[i] = temp; 
} 
  
/*Function to left rotate arr[] of size n by d*/
void leftRotate(int arr[], int d, int n) 
{ 
    for (int i = 0; i < d; i++) 
        leftRotatebyOne(arr, n); 
} 
  
/* utility function to print an array */
void printArray(int arr[], int n) 
{ 
    for (int i = 0; i < n; i++) 
        cout << arr[i] << " "; 
} 
  
/* Driver program to test above functions */
int main() 
{ 
    int arr[] = { 1, 2, 3, 4, 5, 6, 7 }; 
    int n = sizeof(arr) / sizeof(arr[0]); 
  
    // Function calling 
    leftRotate(arr, 2, n); 
    printArray(arr, n); 
  
    return 0; 
}