Rotate (shift) data on array "a" to right on 1 position

// Add to the program on C++  your fragment of code 

// which has to rotate(shift) data on array "a"   to right on 1 position.

// For example,

// array 5, 2, 8, 4

// should transform to array   4, 5, 2, 8

// Don't change the initially given code. 

//

#include <iostream>

#include <math.h>

using namespace std;

#define N 10

int main()

{   int a[N],b;

    for (int i = 0; i < N; i++) a[i] = rand() % 10;

    for (int i=0; i < N; i++) cout << a[i]<<" ";

    cout << "\n";

    //

    // Input here your code 

    //  

    // Inputted code:

    b = a[N - 1];

    for (int i = N-1; i > 0; i--) a[i] = a[i - 1];

    a[0] = b;

    //

    for (int i=0; i < N; i++) cout << a[i] << " ";

    cout << "\n";

 }