[Bug c++/36178] New: rand() combined with vectors negates setw()

["pmaconi at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Assigning a rand() value to a vector element and then accessing the element
seems to negate setw() - no spaces are added to the output. I attempted to
access the element via iterators as well as integer subscripts, neither caused
any change. The console reported no errors or warnings during compile. 

----------- g++ -v output ------------

Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr
--enable-shared --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --enable-nls
--with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)

---------------------- Sample File ---------------

#include <iomanip>
#include <iostream>
#include <vector>
#include <cstdlib>
using namespace std;
void showVector(vector<int> &v);

int main()
{
        vector<int> v(100);



        for(int i=0; i <v.size(); i++)
        {

                v[i] = rand();
        }
        showVector(v);

}

void showVector(vector<int> &v)

{

//------------------------------------------------------

// Display elements of a vector, 10 per line

//------------------------------------------------------

        vector<int> ::iterator p ;

        int count=0 ;

        for(p=v.begin(); p!=v.end(); p++)

        {

                cout << setw(6) << *p ;

                count = (count+1)%10 ;

                if( count==0 ) 

                        cout << endl ;

        }

        cout << endl ;

}


-- 
           Summary: rand() combined with vectors negates setw()
           Product: gcc
           Version: 4.2.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pmaconi at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36178