I'm just a tad frustrated right now, because I need to ask such a n00b
question. I'm trying to use 'random_sample', however, I'm getting back a
compiler error saying; " `random_sample' undeclared (first use this
function) ". I've looked a my C++ header file 'algorithm', and its
definition seems to be there. When I include the old style, algo.h, I only
get a warning, but compilation is successful. Should I just use algo.h,
because the SGI STL documentation says it should exist in header
'algorithm'. What am I doing wrong?!
d 7 1721
deancoo wrote: What am I doing wrong?!
Misspelling random_shuffle?
--
Pete Becker
Dinkumware, Ltd. ( http://www.dinkumware.com)
deancoo wrote: I'm just a tad frustrated right now, because I need to ask such a n00b question. I'm trying to use 'random_sample', however, I'm getting back a compiler error saying; " `random_sample' undeclared (first use this function) ". I've looked a my C++ header file 'algorithm', and its definition seems to be there. When I include the old style, algo.h, I only get a warning, but compilation is successful. Should I just use algo.h, because the SGI STL documentation says it should exist in header 'algorithm'. What am I doing wrong?!
d
`random_sample' is an SGI extension, not part of the standard C++
library -- but using `std::random_sample' is likely to work.
HTH,
--ag
--
Artie Gold -- Austin, Texas http://it-matters.blogspot.com (new post 12/5) http://www.cafepress.com/goldsays
"Artie Gold" <ar*******@austin.rr.com> wrote in message
news:39*************@individual.net... deancoo wrote: I'm just a tad frustrated right now, because I need to ask such a n00b question. I'm trying to use 'random_sample', however, I'm getting back a compiler error saying; " `random_sample' undeclared (first use this function) ". I've looked a my C++ header file 'algorithm', and its definition seems to be there. When I include the old style, algo.h, I only get a warning, but compilation is successful. Should I just use algo.h, because the SGI STL documentation says it should exist in header 'algorithm'. What am I doing wrong?!
d `random_sample' is an SGI extension, not part of the standard C++ library -- but using `std::random_sample' is likely to work.
Hmmm, still not working.
What compiler are you using. Early version of gcc3.. had non standard
STL headers in a separate directory under the __gnu_cxx namespace. Is
that the case with you?
3.4.2
"Raghu Uppalli" <ra****@rocketmail.com> wrote in message
news:11**********************@f14g2000cwb.googlegr oups.com... What compiler are you using. Early version of gcc3.. had non standard STL headers in a separate directory under the __gnu_cxx namespace. Is that the case with you?
My earlier comment may be misleading. Newer versions of gcc/g++ also
have non-standard includes in ext/.
I am assuming you mean gcc-3.4.2. The following works for me...on gcc
3.4.2
#include <ext/algorithm>
#include <iostream>
#include <vector>
using namespace std;
using namespace __gnu_cxx;
int main()
{
const int a = 5;
const int b = 2;
int A[] = {1, 2, 3, 4, 5};
int B[b];
for ( int cnt = 0; cnt < 10; ++cnt) {
random_sample(A, A+a, B, B+b);
cout << "Turn " << cnt << ": " ;
for (int i =0; i < b; ++i) {
cout << B[i] << " ";
}
cout << endl;
}
}
"Raghu Uppalli" <ra****@rocketmail.com> wrote in message
news:11**********************@o13g2000cwo.googlegr oups.com... My earlier comment may be misleading. Newer versions of gcc/g++ also have non-standard includes in ext/.
I am assuming you mean gcc-3.4.2. The following works for me...on gcc 3.4.2
#include <ext/algorithm> #include <iostream> #include <vector> using namespace std; using namespace __gnu_cxx;
int main() { const int a = 5; const int b = 2; int A[] = {1, 2, 3, 4, 5}; int B[b]; for ( int cnt = 0; cnt < 10; ++cnt) { random_sample(A, A+a, B, B+b); cout << "Turn " << cnt << ": " ; for (int i =0; i < b; ++i) { cout << B[i] << " "; } cout << endl; } }
Yup, that was the problem. I wasn't giving the extra bit of path
information in the include statement for the compiler to find the
non-standard algorithm header file.
Thanks a lot dude! Now I don't have to get that darn warning each time I
compile.
Cheers,
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