Answer Posted / k govind

In addition to the previous answer given in Answer #1,
namely References must point to valid objects at the time
of declaration, references also has the following
limitation.

Once a reference is assigned, there's no way you can modify
the reference. However for a pointer type, variable
assignment is legal.

e.g.,

int i, j;

int *pi, *pj;

pi = &i; // pointer to i
pj = &j; // pointer to j

int &k = i; // reference to i

pi = pj; // pi no longer points to i, instead
// it is now pointing to j
k = j; // The reference k is still with i, it is only
// the value of i that is now modified. i is
// assigned the value of j

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