vector of pointers

[sanctus]

Suppose I have a vector defined as

vector <elem*> v;
 

where elem is some struct defined beforehand.
Now if I type :

v[0]
 

I get a pointer to elem, ie elem* where elem* is the first element of v.

My question is what do I have to type in order to access elem, ie the value elem* points to?

[JosAH]

Suppose I have a vector defined as

vector <elem*> v;
 

where elem is some struct defined beforehand.
Now if I type :

v[0]
 

I get a pointer to elem, ie elem* where elem* is the first element of v.

My question is what do I have to type in order to access elem, ie the value elem* points to?

I'd say all you have to do is this:

T foo= v[0]->first_of_elem_struct;
U bar= v[0]->second_of_elem_struct;
// etc.etc.
 

kind regards,

Jos

[sanctus]

I'd say all you have to do is this:

T foo= v[0]->first_of_elem_struct;
U bar= v[0]->second_of_elem_struct;
// etc.etc.
 

kind regards,

Jos

Sorry but I don't understand what you mean. Are T foo and U bar variables to be defined? Or does foo mean something (as I have seen it already quite often on some sites while looking for something else)?

[JosAH]

Sorry but I don't understand what you mean. Are T foo and U bar variables to be defined? Or does foo mean something (as I have seen it already quite often on some sites while looking for something else)?

No, it doesn't mean much but because I don't know what your first and second
etc. elements of your structs are I simply put 'T foo' as the first element and
'U bar' as the second element.

e.g. if the first element of your struct is an int, named 'index', the example
should read:

int index= v[0]->index;
 

kind regards,

Jos