C++/STL Algorithms Modifying sequence operations/partition

separate even values from the odd ones - even comes first

<source lang="cpp">

1. include <algorithm>
2. include <vector>
3. include <iostream>

using namespace std; bool IsEven (const int& nNumber){

   return ((nNumber % 2) == 0);

} int main () {

   vector <int> v;
   for (int nNum = 0; nNum < 10; ++ nNum)
       v.push_back (nNum);
   vector <int> vecCopy (v);
   // separate even values from the odd ones - even comes first.
   partition (v.begin (), v.end (), IsEven);
   for (size_t nItem = 0;  nItem < v.size (); ++ nItem)
       cout << v [nItem] << " ";
   return 0;

}

 </source>