how to reference and dereference pointer code example

Example 1: pointer dereference

int x = 5;
int *p = &x;

x = x + 4;
x = *p + 4;
*p = *p + 4;
cout << x; //Output is 17

Example 2: c++ dereference a pointer

int number;
int value;
int * pNumber;

number = 5;
pNumber = &number;

assert(pNumber); // check before dereferenceing to prevent errors
value = *pNumber // Use * to dereference the pointer