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g++-3.0 question

I'm not a C++ hacker, and would appreciate any help on this.

In preparation for g++-3.0, I setup a Debian unstable chroot tree
on a friend's Red Hat system.  He is upstream for the `gri'
package.  It currently doesn't build on g++-3.0, and he wanted to
port the code.

He is stuck on a problem:

: The attached program FAILS TO COMPILE for g++ version 3 (on a trial
: debian system), but it COMPILES OK for g++ version 2.96 (on
: linux/redhat7.0).  The error is:
:         test.cc: In function `void sub2()':
:         test.cc:24: `reverse' undeclared (first use this function)
: Any advice on how to change the code?
: Thanks!

#include <algorithm>
#include <vector.h>
#include <stdio.h>

void sub1();
void sub2();

int main(){

void sub1() {
        vector<double> s;
        for (int i = 0; i < 3; i++)
                s.push_back(0.1 * i); 
        reverse(s.begin(), s.end());

void sub2() {
        double s[3];
        for (int i = 0; i < 3; i++)
                s[i] = 0.11 * i;
        reverse(s, s + 3);



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