Method reverse

C++/Code/rotateArray.cpp:14–22

class Solution{
    public:
    void reverse(int arr[], int start,int end){
        while(start<end){
            int temp = arr[start];
            arr[start] = arr[end];
            arr[end] = temp;
            start++;
            end--;
        }
    }
    //Function to rotate an array by d elements in counter-clockwise direction. 
    void rotateArr(int arr[], int d, int n){