Your C++ Homework

[Fred Astair]

I used this site for a c++ homework assignment that my teacher left me no
clue on how to do it. http://www.betterteachers.com. Check it out.

Fred

[Howard]

"Joe Van Dyk" <jo*******@no.s pam.gmail.com> wrote in message
news:2004102716 345516807%joeva ndyk@nospamgmai lcom...

On 2004-10-27 02:17:09 -0700, "Gernot Frisch" <[e-mail] > said:

So, if I have a pointer to an int that's unitialized, how do I tell it to
point at a given int?

Two ways:

Point it at an existing variable:

int* p; // uninitialized
....
int a = 6; // stores 6 in variable a
....
p = &a; // now, p points to a, so *p == 6
or,

Create its own memory to point at, and assign a value to that

int* p; // uninitialized
....
p = new int; // create new storage for p to point to
....
*p = 9; // stores 9 in memory set aside for *p
....
delete p; // don't forget to delete when you new!

-Howard

(P.S., you could also set the value of *p in the new statement itself, with
p = new int(9);)

[Kelsey Bjarnason]

[snips]

On Wed, 27 Oct 2004 23:35:04 +0000, Joe Van Dyk wrote:

So, if I have a pointer to an int that's unitialized, how do I tell it
to point at a given int?

Assign it.

int *p; // uninitialized
int x;

*p = 3; // invalid, p hasn't been pointed at anything
p = &x; // perfectly good, points p at x
if ( *p ) // bad again, as x (aka *p) has no defined value
x = 3; // perfectly good
if (*p) // okay now, as x is initialized