My recursive function written in c++ doesn't work

I wanted to make a recursive function for the multiplication of the elements from an array

If my array has 1 element and v[1] is 1 ,the program wil show me 4703488

My question is why?

#include<iostream>

using namespace std;

int prod(int n,int v[100])
{
    if(n)
    {
        return prod(--n,v)*v[n];
    }

    return 1;
}

int main()
{
    int v[100],n,i=1;
    cout<<"n=";
    cin>>n;

    for(i=1;i<=n;i++)
        cin>>v[i];

    cout<<prod(n,v);

    return 0;
}