How do I make for_each work with templates?

I am new to c++ and am trying to understand how for_each works. So I wanted to see how it works with templates and tried this code but it gives out an error

When I tried to use the for each in the main it worked as it should have

template <class T>
void forEachTest(T a[])
{
    for (int x : a)
        cout << x << endl;
}
int main()
{
    int a[5] = { 10, 50, 30, 40, 20 };
    forEachTest(a);
    return 0;
}