Hi, I sort of understood pointers, until I went to cplusplus.com and saw this code:
the output is:Code:#include <iostream> using namespace std; int main () { int firstvalue = 5, secondvalue = 15; int * p1, * p2; p1 = &firstvalue; // p1 = address of firstvalue p2 = &secondvalue; // p2 = address of secondvalue *p1 = 10; // value pointed by p1 = 10 *p2 = *p1; // value pointed by p2 = value pointed by p1 p1 = p2; // p1 = p2 (value of pointer is copied) *p1 = 20; // value pointed by p1 = 20 cout << "firstvalue is " << firstvalue << endl; cout << "secondvalue is " << secondvalue << endl; return 0; }
firstvalue is 10
secondvalue is 20
Ok, what I dont understand is why first value is 10 and not 20. I would really appreciate any simple explanation.
Oh and...Is there something I could think about or remember so that I dont get confused with pointers?
THANKS