left rotation using standard libraries - vector and algorithm

leftRotate.cpp

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

vector<int> left_rotate(vector<int>array, int r){
    rotate(array.begin(), array.begin()+r, array.end());
    return array;
}

int main(){
    
    int n;
    int r;
    
    cout << "Enter number of integers in array: ";
    cin >> n;
    cout << endl;
    cout << "Enter number of rotations to left: ";
    cin >> r;
    cout << endl;
    
    vector<int> arr(n);
    for(int i = 0; i < n; i++){
        cout << "Enter integer: ";
        cin >> arr[i];
    }

    for(int i = 0; i < n; i++){
        cout << arr[i] << " ";
    }
    cout << endl;
    
    vector<int> newArr = left_rotate(arr, r);
    for(int i = 0; i < n; i++){
        cout << newArr[i] << " ";
    }
    cout << endl;

    return 0;
}