pointer question

[Junaid2pac]

This code was at cplusplus.com

// more pointers
#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;
}



My Question
If *p1 = 20 then why does firstvalue = 10[/list]

[Junaid2pac]

sorry nvm

[Junaid2pac]

But can someone explain to me how pointers can be used in functions

[wtd]

Understand how pointers work, how scope works, and how function parameters work. If you understand these things, your questions about pointers and functions will be answered.

[Junaid2pac]

I understand how functions work but i thought i saw something saying that u can't input arrays into a function, instead u have to use pointer instead

Is that true?

[wtd]

False dichotomy.