how to push all array element to the right?

Question

//this program pushes all array numbers to the left. Can someone help me how to make it push them to the right?
#include <iostream>
using namespace std;
int main()
{
int n,i;
float tmp;
cout<<"how many numbers should this array have?"<<endl;
cin>>n;
float a[n];
cout<<"enter the array numbers!"<<endl;
for(i=0;i<n;i++)
cin>>a[i];
tmp=a[0];
for(i=1;i<=n;i++)
a[i-1]=a[i];
a[n-1]=tmp;
cout<<"the new array is ";
for(i=0;i<n;i++)
cout<<a[i];
return 0;
}

Answer 1

use this
tmp=a[n];
for(i=n-1; i > 0; i--)
a[i]=a[i-1];
a[0]=tmp;

Answer 2

thanks very much