Why is 90 the output value of y and q? I just do p=q. How come the value of q is changed?

int main() 
{

    int x;
    int y;
    int *p = &x;
    int *q = &y;

    x = 35;
    y = 46;

    p = q;

    *p = 90;

    cout << x << " " << y << endl;
    cout << *p << " " << *q << endl;
    cout << "Address of p = " << p << endl;
    cout << "Address of q = " << q << endl;

    return 0;
}

The output is:

35 90
90 90
Address of p = 0xbffa83c0
Address of q = 0xbffa83c0
c++ pointers
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