When a pointer is used as reference to an array, it shall refer to an array of the correct type.

Example:

void Foo( int a[], int size )
{
    // do something with a; 
    for (int i = 0; i < size; i++) 
    {
        a[i] = i;
    }
}

int ar[] = {0,0,0};
Foo( ar, sizeof(ar)/sizeof(ar[0]) ); // Ok
...
int* ptr = &ar[1];
Foo( ptr, sizeof(ar)/sizeof(ar[0]) ); //Not allowed: passing pointer ptr in Foo causes out of array bounds.