Reference vs. pointer

Question

What is the difference? Because this:

int Value = 50;
int *pValue = &Value;

*pValue = 88;

and ref version do the same:

Answer 1

The differences are:

Reference is an alias of an object and has the same address as the object.

int a;         //  address of   a : 0x0012AB
int &ref = a;  //  address of ref : 0x0012AB (the same)

References must be initialized :

int &ref = a; // GOOD, is compiling
int &ref;     // BAd, is not compiling

Pointer is another variable that holds an address:

int a = 5;     //  address of a : 0x0012AB 
int *p = &a;   //  address of p : 0x0012AF (is different )

// value of a is 5
// value of p is 0x0012AB  (address of a)

Pointers can be NULL

int *p = NULL;