Problem with sorting a std::vector

ROOT
1

I’ve been trying to do a custom sort (or any sort) of a vector of pairs. The code below works fine when compiled as C++, but when run from the root interpreter, it gives the error:

when it comes to the “sort” command.

Any advice would be appreciated.

Version 5.34/07, Mac OS 10.6.8

Thanks,
Eric

#include <iostream>
#include <vector>
#include <map>
#include <algorithm>

using namespace std;

struct mySort : public binary_function<pair<int,int> &,pair<int,int> &,bool> {
  bool operator()(const pair<int, int>  &p1, const pair<int, int> &p2) {
     return(p1.second>p2.second);
     }
};

int main() {
  vector<pair<int,int> > mvec;
  
  mvec.push_back(pair<int, int>(2200,5));
  mvec.push_back(pair<int, int>(13, 17));
  mvec.push_back(pair<int, int>(16, 1));
  
  for(int i = 0; i< mvec.size() ; i++) cout << mvec[i].first<<" : "<< mvec[i].second<<endl;
  
  sort(mvec.begin(),mvec.end(),mySort());
 
  for(int i = 0; i< mvec.size() ; i++) cout << mvec[i].first<<" : "<< mvec[i].second<<endl;

  return(0);
}
2

Hi,

With ROOT 5 (i.e. using CINT), you will need to compile (via ACLiC for example) your script. This is a CINT limitation.

Cheers,
Philippe.