Regarding the convention of arrays allocated on the heap versus non array

Question

int *p1 = new int;
*p1=5;
// p1 will now hold an address that is pointing to a memory location on the heap and *p1
// will refer to the actual data at that address
// however
int *p2 = NULL;
p2 = new int[20];
p2[0]=2;
delete []p2;
/* Now p2 holds the memory address of the memory location where the array will be stored, and p2[index] refers to the actual data inside the memory location pointed by p2, corresponding to index, why isn't the same convention used for arrays as for non arrays ? Wasn't *p2[0] supposed to refer to the actual data pointed by pointer p2 by the same convention above ? */

Answer 1

it is the same. you canuse *(p+index) or p[index].
p is like an array of length 1.