arrays and pointers question

[Bart Simpson]

I have structs that looks like this:

struct StructA
{
//members ..
};
struct StructB
{
//members ..
struct StructA * ptr_
};
ptr_ is actually a ptr to an array of StuctA types. My question is, how
may I index into the array (pointed to by ptr_) given an index - (I
intentionally ignored array bounds checking to keep the question simple)

[Ben Pfaff]

Bart Simpson <12**********@terrace.comwrites:

I have structs that looks like this:

struct StructA
{
//members ..
};
struct StructB
{
//members ..
struct StructA * ptr_
};
ptr_ is actually a ptr to an array of StuctA types. My question is,
how may I index into the array (pointed to by ptr_) given an index -

Given:
struct StructB b;
you may access the element with index `i' with:
b.ptr_[i]
--
"The fact that there is a holy war doesn't mean that one of the sides
doesn't suck - usually both do..."
--Alexander Viro

[quasimodo]

Given:

struct StructB b;
you may access the element with index `i' with:
b.ptr_[i]

But you have to allocate the memory because * ptr_ is pointed random
memory.

[Tor Rustad]

quasimodo wrote:

>Given:
struct StructB b;
you may access the element with index `i' with:
b.ptr_[i]

But you have to allocate the memory because * ptr_ is pointed random
memory.

struct StructA a[2];

b.ptr_ = a;

--
Tor <torust [at] online [dot] no>