moving "using namespace std" to right place

TileCalorimeter/TileExample/TileSimEx/share/tile_sf.C

@@ -6,7 +6,6 @@
 //-----------------------------------------------------------------------
 
 #include <iostream>
-using namespace std;
 
 #include "TROOT.h"
 #include "TStyle.h"
@@ -20,6 +19,8 @@ using namespace std;
 #include "TProfile.h"
 #include "TProfile2D.h"
 
+using namespace std;
+
 void Make_plots(TString infile_hit, TString infile_truth, TString outfile, bool dofit) {
 
   TTree t;