Help with C++ pointers (not completely, just a simple question)

[Provz]

I know this
int x;
int *p;
p = &x;

would make p == memory address of x, and *p == x. but what if i did this

int x;
int *p;
*p = &x;

if p pointed to int now what does it point to...? and what will this turn out to be? (no access to compiler, sorry :P)

[jA_cOp]

If p was an initialized pointer to another pointer, that would be valid. It's a pointer to an int, so it tries putting the address of x into an int. This will work in C without a cast, but it won't work in C++ without a cast.

Undefined behaviour will occur when you dereference that uninitialized pointer though.

edit:

And to clarify, you're not actually changing the pointer, only the value it points to, so the pointer remains the same.

[Provz]

This helped me, thank you for taking the time to explain. I was hoping I wasn't going to get a short answer.

[Eleventeen]

[QUOTE=jA_cOp;19617892]And to clarify, you're not actually changing the pointer, only the value it points to, so the pointer remains the same.[/QUOTE]

Curious,

int i = 10;
char j = 'j';

int* p;
p = &i;
&p = &j;

?

[jA_cOp]

[QUOTE=Eleventeen;19621257]
&p = &j;[/QUOTE]

Try with valid C++ next time.

[Jallen]

[QUOTE=Eleventeen;19621257]Curious,

int i = 10;
char j = 'j';

int* p;
p = &i;
[B]&p = &j;[/B]

?[/QUOTE]

What the hell is that supposed to do? If anything it would overwrite j, but it wouldn't because you can't just change the address of a variable willy nilly in C++, not that there is any reason anyone would ever want to.

[gparent]

[QUOTE=Eleventeen;19621257]Curious,[/QUOTE]
Were you curious if it would compile? Because it doesn't, for good reason.