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#include <iostream> using namespace std;

int main () {

int firstvalue = 5, secondvalue = 15;

int * p1, * p2;

// p1 = address of firstvalue

p1 = &firstvalue;

// p2 = address of secondvalue

p2 = &secondvalue;

// value pointed by p1 = 10

*p1 = 10;

// value pointed by p2 = value pointed by p1

*p2 = *p1;

p1 = p2; // p1 = p2 (value of pointer is copied)

// value pointed by p1 = 20

*p1 = 20;

cout << "firstvalue is " << firstvalue << endl;

cout << "secondvalue is " << secondvalue << endl; return 0;

}

Output:

firstvalue is 10

secondvalue is 20