I need to learn and understand the concept pointer to a structure.
#Topic: Pointer to a Structure.
timid python
pearl torrentBOT
light flint
struct something{
int a{};
};
auto main() -> int {
something your_struct;
something* pointer_to_your_struct{&your_struct};
}
?
sturdy galleon
```c++
struct something{
int a{};
};
auto main() -> int {
something your_...
Why do people try to explain things to newbies with the weird syntax like auto-> and { } for basic initialization
light flint
you just not need focus on it
sturdy galleon
it's unintuitive syntax or else it would have been the syntax from the start
sturdy galleon
I need to learn and understand the concept `pointer` to a `structure`.
do you understand a pointer to an int
timid python
Why do people try to explain things to newbies with the weird syntax like auto->...
member access operator?
timid python
```c++
struct something{
int a{};
};
auto main() -> int {
something your_...
this is struct to pointer?
timid python
```c++
struct something{
int a{};
};
auto main() -> int {
something your_...
what is this a{}?
timid python
do you understand what is pointer in general
point to an address of a variable.
sturdy galleon
Do you understand pointer to int?
timid python
Do you understand pointer to int?
int is written in that struct. Might be access to that variable 'a'. using pointer p->a something like this
light flint
int is written in that struct. Might be access to that variable 'a'. using point...
p->a is shorthand for (*p).a
timid python
p->a is shorthand for (*p).a
yes
light flint
so what specificly you are asking
timid python
so what specificly you are asking
understanding pointer to structure
light flint
```c++
struct something{
int a{};
};
auto main() -> int {
something your_...
pointer_to_your_struct points to your_struct
timid python
what's the dynamic allocation to access struct using pointer?
stiff thicket
"In point what do mean: "this-> ""
sturdy galleon
int is written in that struct. Might be access to that variable 'a'. using point...
You didn't answer the question
timid python
Do you understand pointer to int?
No, I didn't
stiff thicket
"In point what do mean: "this-> ""
.
true jungle
No, I didn't
a pointer just holds a memory address, and then you dereference that memory address to view the value
structs in cpp are a chunk of memory (which isn't as nice as C because there can be padding, so no navigation by offsets), but there is NEVER padding at the beginning of the struct, so a pointer to a struct is a pointer to its first element
so if I have a struct called Person with 3 elements string name, int age, string birthday, a pointer to this struct would be a pointer to name
sturdy galleon
No, I didn't
if you don't understand pointer to int how can you understand pointer to struct
timid python
if you don't understand pointer to int how can you understand pointer to struct
I understand that syntax that was accessing struct using pointer
Did this a small practice
int main()
cout << "accessing object dynamic allocation" << endl;
struct Rectangle *p;
p = new Rectangle;
cout << p->length << endl;
cout << p->breadth << endl;
p->length = 10, p->breadth = 6;
cout << p->length << endl;
cout << p->breadth << endl;
return 0;
Output shows
0
0
10
6
timid python
!solved