#include<vector>
#include<algorithm> 
#include<iostream>
#include<iterator>
using namespace std;

class ReplaceFunc
{ 
     int mNumComp;
     public:
         ReplaceFunc(int i):mNumComp(i){}
         bool operator()(int i)
         {
              if(i==mNumComp)
                  return true;
              else
                  return false;
         }

};


int main()
{
    int arr[]={3, 3, 6, 4, 9, 6, 1, 4, 6, 6, 7, 3};
    std::vector<int> vec(arr,arr + sizeof(arr)/sizeof(arr[0]));

    cout<<"Before\n";
    copy(vec.begin(),vec.end(),ostream_iterator<int>(cout,"\n"));
    
    std::replace_if(vec.begin(),vec.end(),ReplaceFunc(3),54);
    
    cout<<"After\n";
    copy(vec.begin(),vec.end(),ostream_iterator<int>(cout,"\n"));

    return 0;
}