Re: [Dev-C++] STL list problem

[<h.r...@gm...>]

> Hello all,
> 
> I get an errormessage when I compile and I can't figure out what the
>  problem is.
> Here's the code
> 
> #include <iostream>
> #include <list>
> 
> int main(int argc, char *argv[]){
>   list<int> initialWeightList;
>   for(int i=0; i<10; i++)
>     initialWeightList.push_back(i);               
>  
>  list<int>::iterator iter;
>  for(
>    iter = initialWeightList.begin(); 
>    iter < initialWeightList.end(); // <--- error ?!?!?!
>     iter++
>     ){
>     cout << "Here i do something" << endl;
>     }    
> }
> 
> and here's the errormessage
> 
> 12 D:\Programmering\IDE\Dev-Cpp\__Projects\Test\main.cpp
> no match for `_List_iterator<int,int &,int *> & < _List_iterator<int,int
>  &,int *>'
> 
> The for-statement is split up so I can locate the error
> 
> Any ideas?
> If I replace all list<int> by vector<int>, and include <vector> ofcourse,
>  it works just fine.
> 
> Regards
> /Jörgen
> 
> 
Hi,
This works (with mingw2.0.0-3):

#include <iostream>
#include <list>

using namespace std;

int main(int argc, char *argv[]){
  list<int> initialWeightList;
  for(int i=0; i<10; i++)
    initialWeightList.push_back(i);               
 
 list<int>::iterator iter;
 for(
   iter = initialWeightList.begin();
   iter != initialWeightList.end(); // <--- error ?!?!?!
    iter++
    ){
    cout << "Here i do something" << endl;
    }
    
    system("PAUSE");    
}

I think it is wrong to compare two iterators with < because in a list the
items are anywhere in the memory and not in order (as in vector). Iterators are
like pointers. You can compare it with == or !=.

regards
Horst

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