dereference.cpp

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#include <iostream>
 
using namespace std;
 
int main()
{
    int x = 10, y;
    int * ptr = &x;
 
    y = *ptr;
    *ptr = 20;
    cout << x << ' ' << y << endl;
    cout << *ptr << endl;
 
    ptr = &y;
    (*ptr)++;
    cout << x << ' ' << y << endl;
    cout << *ptr << endl;
 
    return 0;
}