problems using vector in gcc3.2

problems using vector in gcc3.2

[david d]

this peace of code:
#include <iostream>
#include <vector>
using namespace std;
int main(){
   std::vector <int> v;
   v.push_back(5);
   cout<<v[0]<<endl;
   const  int * beg = v.begin();


    return 0;
}


compiles with no warnings or errors in gcc 2.96, but
when I try to compile it with gcc 3.2, I get the
following error message:
[me@my xx]$ gcc -c xx.cpp
xx.cpp: In function `int main()':
xx.cpp:8: cannot convert
`__gnu_cxx::__normal_iterator<int*, std::vector<int,
   std::allocator<int> > >' to `const int*' in
initialization

How can one solve this problem (besides compiling the
code with the old compiler)?
thanks in advance

Re: problems using vector in gcc3.2

[bjorn rohde jensen]

Hi David,

  You are supposed to use a std::vector<int>::itterator
and not an int *. It looks like, itterators were implemented
as ordinary pointers in your old compiler, but not in
the new one. The code was accidentally correct with your
old compiler but not portable:)

Yours sincerely,

Bjorn

Re: problems using vector in gcc3.2

[Miguel Ramirez]

Hi,

>    const  int * beg = v.begin();

If you want the pointer you can get it the following way:

const int* beg = &(*(v.begin()));

> xx.cpp: In function `int main()':
> xx.cpp:8: cannot convert
> `__gnu_cxx::__normal_iterator<int*, std::vector<int,
>    std::allocator<int> > >' to `const int*' in
> initialization
> 

Note that the error message is saying to you:

 I cannot convert at compile time from vector<int>::iterator
to const int*.