diff --git a/src/BOPTest/BOPTest_LowCommands.cxx b/src/BOPTest/BOPTest_LowCommands.cxx
index 69c8f357cf..fc9bb016dc 100755
--- a/src/BOPTest/BOPTest_LowCommands.cxx
+++ b/src/BOPTest/BOPTest_LowCommands.cxx
@@ -88,49 +88,36 @@ static  Standard_Integer bhaspc      (Draw_Interpretor& , Standard_Integer , con
 //function : bclassify
 //purpose  : 
 //=======================================================================
-Standard_Integer bclassify (Draw_Interpretor& aDI,
-                            Standard_Integer n, 
-                            const char** a)
+Standard_Integer bclassify (Draw_Interpretor& theDI,
+                            Standard_Integer  theArgNb,
+                            const char**      theArgVec)
 {
-  char sbf[512];	
-  
-  if (n < 3) {
-    Sprintf(sbf, " Use >bclassify Solid Point [Tolerance=1.e-7]\n");
-    aDI<<sbf;
+  if (theArgNb < 3)
+  {
+    theDI << " Use >bclassify Solid Point [Tolerance=1.e-7]\n";
     return 1;
   }
-  
-  TopoDS_Shape aS = DBRep::Get(a[1]);
-  if (aS.IsNull()) {
-    Sprintf(sbf, " Null Shape is not allowed here\n");
-    aDI<<sbf;
+
+  TopoDS_Shape aS = DBRep::Get (theArgVec[1]);
+  if (aS.IsNull())
+  {
+    theDI << " Null Shape is not allowed here\n";
     return 1;
   }
-  
-  if (aS.ShapeType()!=TopAbs_SOLID) {
-    Sprintf(sbf, " Shape type must be SOLID\n");
-    aDI<<sbf;
+  else if (aS.ShapeType() != TopAbs_SOLID)
+  {
+    theDI << " Shape type must be SOLID\n";
     return 1;
   }
-  //
-  Standard_Real aTol=1.e-7;
-  TopAbs_State aState = TopAbs_UNKNOWN;
-  gp_Pnt aP(8., 9., 10.);
-  
-  DrawTrSurf::GetPoint(a[2], aP);
-  
-  aTol=1.e-7; 
-  if (n==4) {
-    aTol=Draw::Atof(a[3]);
-  }
-  //
-  BRepClass3d_SolidClassifier aSC(aS);
-  aSC.Perform(aP,aTol);
-  //
-  aState = aSC.State();
-  //
-  PrintState (aDI, aState);
-  //
+
+  gp_Pnt aP (8., 9., 10.);
+  DrawTrSurf::GetPoint (theArgVec[2], aP);
+  const Standard_Real aTol = (theArgNb == 4) ? Draw::Atof (theArgVec[3]) : 1.e-7; //Precision::Confusion();
+
+  BRepClass3d_SolidClassifier aSC (aS);
+  aSC.Perform (aP,aTol);
+
+  PrintState (theDI, aSC.State());
   return 0;
 }
 //
@@ -138,50 +125,37 @@ Standard_Integer bclassify (Draw_Interpretor& aDI,
 //function : b2dclassify
 //purpose  : 
 //=======================================================================
-Standard_Integer b2dclassify (Draw_Interpretor& aDI,
-                              Standard_Integer n, 
-                              const char** a)
+Standard_Integer b2dclassify (Draw_Interpretor& theDI,
+                              Standard_Integer  theArgNb,
+                              const char**      theArgVec)
 {
-  char sbf[512];	
-  
-  if (n < 3) {
-    Sprintf(sbf, " Use >bclassify Face Point2d [Tol2D=Tol(Face)]\n");
-    aDI<<sbf;
+  if (theArgNb < 3)
+  {
+    theDI << " Use >bclassify Face Point2d [Tol2D=Tol(Face)]\n";
     return 1;
   }
-  
-  TopoDS_Shape aS = DBRep::Get(a[1]);
-  if (aS.IsNull()) {
-    Sprintf(sbf, " Null Shape is not allowed here\n");
-    aDI<<sbf;
+
+  TopoDS_Shape aS = DBRep::Get (theArgVec[1]);
+  if (aS.IsNull())
+  {
+    theDI << " Null Shape is not allowed here\n";
     return 1;
   }
-  
-  if (aS.ShapeType()!=TopAbs_FACE) {
-    Sprintf(sbf, " Shape type must be FACE\n");
-    aDI<<sbf;
+  else if (aS.ShapeType() != TopAbs_FACE)
+  {
+    theDI << " Shape type must be FACE\n";
     return 1;
   }
-  //
-  Standard_Real aTol;
-  TopAbs_State aState = TopAbs_UNKNOWN;
-  gp_Pnt2d aP(8., 9.);
-  
-  DrawTrSurf::GetPoint2d(a[2], aP);
-  
-  const TopoDS_Face& aF=TopoDS::Face(aS);
-  aTol=BRep_Tool::Tolerance(aF); 
-  if (n==4) {
-    aTol=Draw::Atof(a[3]);
-  }
-  //
+
+  gp_Pnt2d aP (8., 9.);
+  DrawTrSurf::GetPoint2d (theArgVec[2], aP);
+  const TopoDS_Face&  aF   = TopoDS::Face(aS);
+  const Standard_Real aTol = (theArgNb == 4) ? Draw::Atof (theArgVec[3]) : BRep_Tool::Tolerance (aF);
+
   BRepClass_FaceClassifier aClassifier;
   aClassifier.Perform(aF, aP, aTol);
-  //
-  aState = aClassifier.State();
-  //
-  PrintState (aDI, aState);
-  //
+
+  PrintState (theDI, aClassifier.State());
   return 0;
 }
 
@@ -232,38 +206,19 @@ Standard_Integer bhaspc (Draw_Interpretor& di, Standard_Integer n, const char**
 
 //=======================================================================
 //function : PrintState
-//purpose  : 
+//purpose  :
 //=======================================================================
-void PrintState (Draw_Interpretor& aDI,
-                 const TopAbs_State& aState)
+void PrintState (Draw_Interpretor&   theDI,
+                 const TopAbs_State& theState)
 {
-  char sbf[512];	
-  TCollection_AsciiString sIN("IN"), sOUT("OUT of"), sON("ON"), sUNKNOWN("UNKNOWN"); 
-  //
-  Sprintf(sbf, "The point is "); aDI<<sbf;
-  //
-  switch (aState) {
-  case TopAbs_IN:
-    Sprintf(sbf, sIN.ToCString());
-    break;
-  case TopAbs_OUT:
-    Sprintf(sbf, sOUT.ToCString());
-    break;
-  case TopAbs_ON:
-    Sprintf(sbf, sON.ToCString());
-    break;
-  case TopAbs_UNKNOWN:
-    Sprintf(sbf, sUNKNOWN.ToCString());
-    break;
-  default:
-    Sprintf(sbf, sUNKNOWN.ToCString()); 
-    break;
+  switch (theState)
+  {
+    case TopAbs_IN:       theDI << "The point is IN shape\n";      return;
+    case TopAbs_OUT:      theDI << "The point is OUT of shape\n";  return;
+    case TopAbs_ON:       theDI << "The point is ON shape\n";      return;
+    case TopAbs_UNKNOWN:
+    default:              theDI << "The point is UNKNOWN shape\n"; return;
   }
-  aDI<<sbf; 
-  //
-  Sprintf(sbf, " shape\n");
-  aDI<<sbf;
-  
 }
 
 //=======================================================================
@@ -316,4 +271,3 @@ Handle(Geom2d_Curve) CurveOnSurface(const TopoDS_Edge& E,
   }
   return nullPCurve;
 }
-
diff --git a/src/IFSelect/IFSelect_SessionPilot.cxx b/src/IFSelect/IFSelect_SessionPilot.cxx
index 3f800f8f03..b9d4519938 100755
--- a/src/IFSelect/IFSelect_SessionPilot.cxx
+++ b/src/IFSelect/IFSelect_SessionPilot.cxx
@@ -239,7 +239,7 @@ static TCollection_AsciiString nulword;
 
   for (;;) {
     char ligne[100];
-    if (!lefic) printf (theprompt.ToCString());
+    if (!lefic) std::cout << theprompt.ToCString();
     ligne[0] = '\0';
     fgets(ligne,100,fic);
     if (feof(fic)) break;
diff --git a/src/NCollection/NCollection_BaseAllocator.cxx b/src/NCollection/NCollection_BaseAllocator.cxx
index 267744cd9b..d3f61e15f6 100755
--- a/src/NCollection/NCollection_BaseAllocator.cxx
+++ b/src/NCollection/NCollection_BaseAllocator.cxx
@@ -24,6 +24,8 @@
 #include <NCollection_Map.hxx>
 #include <NCollection_List.hxx>
 #include <Standard_Mutex.hxx>
+#include <fstream>
+#include <iomanip>
 
 IMPLEMENT_STANDARD_HANDLE(NCollection_BaseAllocator,MMgt_TShared)
 IMPLEMENT_STANDARD_RTTIEXT(NCollection_BaseAllocator,MMgt_TShared)
@@ -254,35 +256,55 @@ void NCollection_BaseAllocator::PrintMemUsageStatistics()
   }
   Standard_Size aTotAlloc = 0;
   Standard_Size aTotLeft = 0;
+
   // print
-  FILE * ff = fopen("memstat.d", "wt");
-  if (ff == NULL)
+  std::ofstream aFileOut ("memstat.d", std::ios_base::trunc | std::ios_base::out);
+  if (!aFileOut.is_open())
   {
-    cout << "failure writing file memstat.d" << endl;
+    std::cout << "failure writing file memstat.d" << std::endl;
     return;
   }
-  fprintf(ff, "%12s %12s %12s %12s %12s\n",
-          "BlockSize", "NbAllocated", "NbLeft", "Allocated", "Left");
+  aFileOut.imbue (std::locale ("C"));
+
+  // header
+  aFileOut << std::setw(20) << "BlockSize"   << ' '
+           << std::setw(12) << "NbAllocated" << ' '
+           << std::setw(12) << "NbLeft"      << ' '
+           << std::setw(20) << "Allocated"   << ' '
+           << std::setw(20) << "Left"        << '\n';
+
+  // body
   for (itLst.Init(aColl); itLst.More(); itLst.Next())
   {
     const StorageInfo& aInfo = itLst.Value();
     Standard_Integer nbLeft = aInfo.nbAlloc - aInfo.nbFree;
     Standard_Size aSizeAlloc = aInfo.nbAlloc * aInfo.roundSize;
     Standard_Size aSizeLeft = nbLeft * aInfo.roundSize;
-    fprintf(ff, "%12d %12d %12d %12d %12d\n", aInfo.roundSize,
-            aInfo.nbAlloc, nbLeft, aSizeAlloc, aSizeLeft);
+
+    aFileOut << std::setw(20) << aInfo.roundSize << ' '
+             << std::setw(12) << aInfo.nbAlloc   << ' '
+             << std::setw(12) << nbLeft          << ' '
+             << std::setw(20) << aSizeAlloc      << ' '
+             << std::setw(20) << aSizeLeft       << '\n';
+
     aTotAlloc += aSizeAlloc;
-    aTotLeft += aSizeLeft;
+    aTotLeft  += aSizeLeft;
   }
-  fprintf(ff, "%12s %12s %12s %12d %12d\n", "Total:", "", "",
-          aTotAlloc, aTotLeft);
+
+  // footer
+  aFileOut << std::setw(20) << "Total:"  << ' '
+           << std::setw(12) << ""        << ' '
+           << std::setw(12) << ""        << ' '
+           << std::setw(20) << aTotAlloc << ' '
+           << std::setw(20) << aTotLeft  << '\n';
 
   if (!StorageIDSet().IsEmpty())
   {
-    fprintf(ff, "Alive allocation numbers of size=%d\n", StandardCallBack_CatchSize());
-    NCollection_Map<Standard_Size>::Iterator itMap1(StorageIDSet());
-    for (; itMap1.More(); itMap1.Next())
-      fprintf(ff, "%d\n", itMap1.Key());
+    aFileOut << "Alive allocation numbers of size=" << StandardCallBack_CatchSize() << '\n';
+    for (NCollection_Map<Standard_Size>::Iterator itMap1(StorageIDSet()); itMap1.More(); itMap1.Next())
+    {
+      aFileOut << itMap1.Key() << '\n';
+    }
   }
-  fclose(ff);
+  aFileOut.close();
 }
diff --git a/src/NCollection/NCollection_HeapAllocator.cxx b/src/NCollection/NCollection_HeapAllocator.cxx
index 85f3d5af76..f1bd6c5ade 100755
--- a/src/NCollection/NCollection_HeapAllocator.cxx
+++ b/src/NCollection/NCollection_HeapAllocator.cxx
@@ -17,8 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
-
 #include <NCollection_HeapAllocator.hxx>
 #include <Standard_OutOfMemory.hxx>
 #include <Standard_Mutex.hxx>
@@ -35,13 +33,14 @@ void * NCollection_HeapAllocator::Allocate (const Standard_Size theSize)
 {
   // the size is rounded up to word size.
   const Standard_Size aRoundSize = (theSize + 3) & ~0x3;
-  void * pResult = malloc(aRoundSize);
-  if (!pResult) {
-    char buf[128];
-    sprintf (buf, "Failed to allocate %d bytes in global dynamic heap",theSize);
-    Standard_OutOfMemory::Raise(&buf[0]);
+  void* aResult = malloc (aRoundSize);
+  if (aResult == NULL)
+  {
+    char aBuffer[96];
+    Sprintf (aBuffer, "Failed to allocate %" PRIuPTR " bytes in global dynamic heap", theSize);
+    Standard_OutOfMemory::Raise (aBuffer);
   }
-  return pResult;
+  return aResult;
 }
 
 //=======================================================================
diff --git a/src/NCollection/NCollection_IncAllocator.cxx b/src/NCollection/NCollection_IncAllocator.cxx
index 77fc53689f..107a77ae77 100755
--- a/src/NCollection/NCollection_IncAllocator.cxx
+++ b/src/NCollection/NCollection_IncAllocator.cxx
@@ -17,13 +17,14 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
 #include <NCollection_IncAllocator.hxx>
 #include <NCollection_DataMap.hxx>
 #include <NCollection_Map.hxx>
 #include <Standard_Mutex.hxx>
 #include <Standard_OutOfMemory.hxx>
 #include <stdio.h>
+#include <fstream>
+#include <iomanip>
 
 IMPLEMENT_STANDARD_HANDLE  (NCollection_IncAllocator,NCollection_BaseAllocator)
 IMPLEMENT_STANDARD_RTTIEXT (NCollection_IncAllocator,NCollection_BaseAllocator)
@@ -134,34 +135,40 @@ static void Debug_Destroy(Standard_Address theAlloc)
 
 Standard_EXPORT void IncAllocator_PrintAlive()
 {
-  if (!StorageIDSet().IsEmpty())
+  if (StorageIDSet().IsEmpty())
   {
-    FILE * ff = fopen("inc_alive.d", "wt");
-    if (ff == NULL)
-    {
-      cout << "failure writing file inc_alive.d" << endl;
-    }
-    else
-    {
-      fprintf(ff, "Alive IncAllocators (number, size in Kb)\n");
-      NCollection_DataMap<Standard_Address, Standard_Size>::Iterator
-        itMap(StorageIDMap());
-      Standard_Size aTotSize = 0;
-      Standard_Integer nbAlloc = 0;
-      for (; itMap.More(); itMap.Next())
-      {
-        NCollection_IncAllocator* anAlloc =
-          static_cast<NCollection_IncAllocator*>(itMap.Key());
-        Standard_Size anID = itMap.Value();
-        Standard_Size aSize = anAlloc->GetMemSize();
-        aTotSize += aSize;
-        nbAlloc++;
-        fprintf(ff, "%-8d %8.1f\n", anID, double(aSize)/1024);
-      }
-      fprintf(ff, "Total:\n%-8d %8.1f\n", nbAlloc, double(aTotSize)/1024);
-      fclose(ff);
-    }
+    return;
   }
+
+  std::ofstream aFileOut ("inc_alive.d", std::ios_base::trunc | std::ios_base::out);
+  if (!aFileOut.is_open())
+  {
+    std::cout << "failure writing file inc_alive.d" << std::endl;
+    return;
+  }
+  aFileOut.imbue (std::locale ("C"));
+  aFileOut << std::fixed << std::setprecision(1);
+
+  aFileOut << "Alive IncAllocators (number, size in Kb)\n";
+  Standard_Size    aTotSize = 0;
+  Standard_Integer nbAlloc  = 0;
+  for (NCollection_DataMap<Standard_Address, Standard_Size>::Iterator itMap (StorageIDMap());
+       itMap.More(); itMap.Next())
+  {
+    const NCollection_IncAllocator* anAlloc = static_cast<NCollection_IncAllocator*>(itMap.Key());
+    Standard_Size anID  = itMap.Value();
+    Standard_Size aSize = anAlloc->GetMemSize();
+    aTotSize += aSize;
+    nbAlloc++;
+    aFileOut << std::setw(20) << anID << ' '
+             << std::setw(20) << (double(aSize) / 1024.0)
+             << '\n';
+  }
+  aFileOut << "Total:\n"
+           << std::setw(20) << nbAlloc << ' '
+           << std::setw(20) << (double(aTotSize) / 1024.0)
+           << '\n';
+  aFileOut.close();
 }
 
 //=======================================================================
diff --git a/src/NCollection/NCollection_IncAllocator.hxx b/src/NCollection/NCollection_IncAllocator.hxx
index 1a0576b412..29f8dd55db 100755
--- a/src/NCollection/NCollection_IncAllocator.hxx
+++ b/src/NCollection/NCollection_IncAllocator.hxx
@@ -17,8 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
-
 #ifndef NCollection_IncAllocator_HeaderFile
 #define NCollection_IncAllocator_HeaderFile
 
@@ -123,5 +121,4 @@ class NCollection_IncAllocator : public NCollection_BaseAllocator
 // Definition of HANDLE object using Standard_DefineHandle.hxx
 DEFINE_STANDARD_HANDLE (NCollection_IncAllocator, NCollection_BaseAllocator)
 
-
 #endif
diff --git a/src/OSD/OSD_MAllocHook.cxx b/src/OSD/OSD_MAllocHook.cxx
index 23dc25ffd0..3ce94e6ae4 100755
--- a/src/OSD/OSD_MAllocHook.cxx
+++ b/src/OSD/OSD_MAllocHook.cxx
@@ -17,7 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
 #include <OSD_MAllocHook.hxx>
 
 #ifndef WNT
@@ -30,6 +29,7 @@
 #include <set>
 #include <map>
 #include <cstdlib>
+#include <iomanip>
 
 #ifndef SIZE_MAX
 #define SIZE_MAX UINT_MAX
@@ -175,9 +175,9 @@ void OSD_MAllocHook::SetCallback(Callback* theCB)
 //=======================================================================
 
 OSD_MAllocHook::LogFileHandler::LogFileHandler()
-: myLogFile(NULL),
-  myBreakSize(0)
+: myBreakSize(0)
 {
+  myLogFile.imbue (std::locale ("C"));
 }
 
 //=======================================================================
@@ -198,13 +198,15 @@ OSD_MAllocHook::LogFileHandler::~LogFileHandler()
 Standard_Boolean OSD_MAllocHook::LogFileHandler::Open(const char* theFileName)
 {
   Close();
-  myLogFile = fopen(theFileName, "w");
-  if (myLogFile != NULL)
+  myLogFile.open (theFileName);
+  if (!myLogFile.is_open())
   {
-    fputs("Operation type; Request Number; Block Size\n", myLogFile);
-    fputs("------------------------------------------\n", myLogFile);
+    return Standard_False;
   }
-  return myLogFile != NULL;
+
+  myLogFile << "Operation type; Request Number; Block Size\n"
+               "------------------------------------------\n";
+  return Standard_True;
 }
 
 //=======================================================================
@@ -214,10 +216,9 @@ Standard_Boolean OSD_MAllocHook::LogFileHandler::Open(const char* theFileName)
 
 void OSD_MAllocHook::LogFileHandler::Close()
 {
-  if (myLogFile != NULL)
+  if (myLogFile.is_open())
   {
-    fclose(myLogFile);
-    myLogFile = NULL;
+    myLogFile.close();
   }
 }
 
@@ -342,12 +343,21 @@ Standard_Boolean OSD_MAllocHook::LogFileHandler::MakeReport
   fclose(aLogFile);
 
   // print the report
-  FILE* aRepFile = fopen(theOutFile, "w");
-  if (aRepFile == NULL)
+  std::ofstream aRepFile (theOutFile);
+  if(!aRepFile.is_open())
+  {
     return Standard_False;
-  fprintf(aRepFile, "%10s %10s %10s %10s %10s %10s %10s\n",
-          "BlockSize", "NbAlloc", "NbLeft", "NbLeftPeak",
-          "AllocSize", "LeftSize", "PeakSize");
+  }
+  aRepFile.imbue (std::locale ("C"));
+
+  aRepFile << std::setw(20) << "BlockSize "
+           << std::setw(10) << "NbAlloc "
+           << std::setw(10) << "NbLeft "
+           << std::setw(10) << "NbLeftPeak "
+           << std::setw(20) << "AllocSize "
+           << std::setw(20) << "LeftSize "
+           << std::setw(20) << "PeakSize " << std::endl;
+
   Standard_Size aTotAlloc = 0;
   for (std::set<StorageInfo>::const_iterator it = aStMap.begin();
        it != aStMap.end(); ++it)
@@ -357,9 +367,15 @@ Standard_Boolean OSD_MAllocHook::LogFileHandler::MakeReport
     Standard_Size aSizeAlloc = aInfo.nbAlloc * aInfo.size;
     Standard_Size aSizeLeft = nbLeft * aInfo.size;
     Standard_Size aSizePeak = aInfo.nbLeftPeak * aInfo.size;
-    fprintf(aRepFile, "%10d %10d %10d %10d %10Iu %10Iu %10Iu\n", aInfo.size,
-            aInfo.nbAlloc, nbLeft, aInfo.nbLeftPeak,
-            aSizeAlloc, aSizeLeft, aSizePeak);
+
+    aRepFile << std::setw(20) << aInfo.size << ' '
+             << std::setw(10) << aInfo.nbAlloc << ' '
+             << std::setw(10) << nbLeft << ' '
+             << std::setw(10) << aInfo.nbLeftPeak << ' '
+             << std::setw(20) << aSizeAlloc << ' '
+             << std::setw(20) << aSizeLeft << ' '
+             << std::setw(20) << aSizePeak << std::endl;
+
     if (aTotAlloc + aSizeAlloc < aTotAlloc) // overflow ?
       aTotAlloc = SIZE_MAX;
     else
@@ -368,13 +384,19 @@ Standard_Boolean OSD_MAllocHook::LogFileHandler::MakeReport
     {
       for (std::set<unsigned long>::const_iterator it1 = aInfo.alive->begin();
            it1 != aInfo.alive->end(); ++it1)
-        fprintf(aRepFile, "%10lu\n", *it1);
+      aRepFile << std::setw(10) << *it1;
     }
   }
-  fprintf(aRepFile, "%10s %10s %10s %10s%c%10Iu %10Iu %10Iu\n", "Total:",
-          "", "", "", (aTotAlloc == SIZE_MAX ? '>' : ' '), aTotAlloc,
-          aTotalLeftSize, aTotalPeakSize);
-  fclose(aRepFile);
+  aRepFile << std::setw(20) << "Total:"
+           << std::setw(10) << "" << ' '
+           << std::setw(10) << "" << ' '
+           << std::setw(10) << "" << ' '
+           << (aTotAlloc == SIZE_MAX ? '>' : ' ')
+           << std::setw(20) << aTotAlloc << ' '
+           << std::setw(20) << aTotalLeftSize << ' '
+           << std::setw(20) << aTotalPeakSize << std::endl;
+
+  aRepFile.close();
   return Standard_True;
 }
 
@@ -387,10 +409,11 @@ void OSD_MAllocHook::LogFileHandler::AllocEvent
                    (size_t      theSize,
                     long        theRequestNum)
 {
-  if (myLogFile != NULL)
+  if (myLogFile.is_open())
   {
     myMutex.Lock();
-    fprintf(myLogFile, "alloc %10lu %10u\n", theRequestNum, theSize);
+    myLogFile << "alloc "<< std::setw(10) << theRequestNum
+              << std::setw(20) << theSize << std::endl;
     myMutex.Unlock();
     if (myBreakSize == theSize)
     {
@@ -409,10 +432,11 @@ void OSD_MAllocHook::LogFileHandler::FreeEvent
                     size_t      theSize,
                     long        theRequestNum)
 {
-  if (myLogFile != NULL)
+  if (myLogFile.is_open())
   {
     myMutex.Lock();
-    fprintf(myLogFile, "free  %10lu %10u\n", theRequestNum, theSize);
+    myLogFile << "free " << std::setw(20) << theRequestNum
+              << std::setw(20) << theSize << std::endl;
     myMutex.Unlock();
   }
 }
@@ -477,12 +501,20 @@ void OSD_MAllocHook::CollectBySize::Reset()
 Standard_Boolean OSD_MAllocHook::CollectBySize::MakeReport(const char* theOutFile)
 {
   // print the report
-  FILE* aRepFile = fopen(theOutFile, "w");
-  if (aRepFile == NULL)
+  std::ofstream aRepFile(theOutFile);
+  if (!aRepFile.is_open())
     return Standard_False;
-  fprintf(aRepFile, "%10s %10s %10s %10s %10s %10s %10s\n",
-          "BlockSize", "NbAlloc", "NbLeft", "NbLeftPeak",
-          "AllocSize", "LeftSize", "PeakSize");
+  std::locale aCLoc("C");
+  aRepFile.imbue(aCLoc);
+
+  aRepFile << std::setw(10) << "BlockSize "
+           << std::setw(10) << "NbAlloc "
+           << std::setw(10) << "NbLeft "
+           << std::setw(10) << "NbLeftPeak "
+           << std::setw(20) << "AllocSize "
+           << std::setw(20) << "LeftSize "
+           << std::setw(20) << "PeakSize " << std::endl;
+
   Standard_Size aTotAlloc = 0;
   for (int i = 0; i < MAX_ALLOC_SIZE; i++)
   {
@@ -493,19 +525,30 @@ Standard_Boolean OSD_MAllocHook::CollectBySize::MakeReport(const char* theOutFil
       Standard_Size aSizeAlloc = myArray[i].nbAlloc * aSize;
       ptrdiff_t     aSizeLeft = nbLeft * aSize;
       Standard_Size aSizePeak = myArray[i].nbLeftPeak * aSize;
-      fprintf(aRepFile, "%10d %10d %10d %10d %10Iu %10Id %10Iu\n", aSize,
-              myArray[i].nbAlloc, nbLeft, myArray[i].nbLeftPeak,
-              aSizeAlloc, aSizeLeft, aSizePeak);
+
+      aRepFile << std::setw(10) << aSize << ' '
+               << std::setw(10) << myArray[i].nbAlloc << ' '
+               << std::setw(10) << nbLeft << ' '
+               << std::setw(10) << myArray[i].nbLeftPeak << ' '
+               << std::setw(20) << aSizeAlloc << ' '
+               << std::setw(20) << aSizeLeft << ' '
+               << std::setw(20) << aSizePeak << std::endl;
+
       if (aTotAlloc + aSizeAlloc < aTotAlloc) // overflow ?
         aTotAlloc = SIZE_MAX;
       else
         aTotAlloc += aSizeAlloc;
     }
   }
-  fprintf(aRepFile, "%10s %10s %10s %10s%c%10Iu %10Id %10Iu\n", "Total:",
-          "", "", "", (aTotAlloc == SIZE_MAX ? '>' : ' '), aTotAlloc,
-          myTotalLeftSize, myTotalPeakSize);
-  fclose(aRepFile);
+  aRepFile << std::setw(10) << "Total:" << ' '
+           << std::setw(10) << "" << ' '
+           << std::setw(10) << "" << ' '
+           << std::setw(10) << "" << ' '
+           << (aTotAlloc == SIZE_MAX ? '>' : ' ')
+           << std::setw(20) << aTotAlloc  << ' '
+           << std::setw(20) << myTotalLeftSize  << ' '
+           << std::setw(20) << myTotalPeakSize << std::endl;
+  aRepFile.close();
   return Standard_True;
 }
 
diff --git a/src/OSD/OSD_MAllocHook.hxx b/src/OSD/OSD_MAllocHook.hxx
index a983900a3b..58ae3038cc 100755
--- a/src/OSD/OSD_MAllocHook.hxx
+++ b/src/OSD/OSD_MAllocHook.hxx
@@ -24,6 +24,7 @@
 #include <Standard_TypeDef.hxx>
 #include <Standard_Mutex.hxx>
 #include <stdio.h>
+#include <fstream>
 
 /**
  * This class provides the possibility to set callback for memory
@@ -105,7 +106,7 @@ public:
     Standard_EXPORT virtual void FreeEvent(void*, size_t, long);
 
   private:
-    FILE*          myLogFile;
+    std::ofstream  myLogFile;
     Standard_Mutex myMutex;
     size_t         myBreakSize;
   };
diff --git a/src/QABugs/QABugs_11.cxx b/src/QABugs/QABugs_11.cxx
index aaab1ab5cb..11a67630db 100755
--- a/src/QABugs/QABugs_11.cxx
+++ b/src/QABugs/QABugs_11.cxx
@@ -17,8 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
-
 #include <stdio.h>
 
 #include <QABugs.hxx>
@@ -885,76 +883,47 @@ static Standard_Integer OCC381_SaveAs (Draw_Interpretor& di, Standard_Integer nb
 
 #include <BRepClass3d_SolidClassifier.hxx>
 
-Standard_Integer OCC299bug (Draw_Interpretor& di,
-			    Standard_Integer n,
-			    const char ** a)
+Standard_Integer OCC299bug (Draw_Interpretor& theDi,
+                            Standard_Integer  theArgNb,
+                            const char**      theArgVec)
 {
-  char sbf[512];
-
-  if (n < 3) {
-    di << "Usage : " << a[0] << " Solid Point [Tolerance=1.e-7]" << "\n";
+  if (theArgNb < 3)
+  {
+    theDi << "Usage : " << theArgVec[0] << " Solid Point [Tolerance=1.e-7]\n";
     return -1;
   }
 
-  TopoDS_Shape aS = DBRep::Get(a[1]);
-  if (aS.IsNull()) {
-    Sprintf(sbf, " Null Shape is not allowed here\n");
-    di<<sbf;
+  TopoDS_Shape aS = DBRep::Get (theArgVec[1]);
+  if (aS.IsNull())
+  {
+    theDi << " Null Shape is not allowed here\n";
+    return 1;
+  }
+  else if (aS.ShapeType() != TopAbs_SOLID)
+  {
+    theDi << " Shape type must be SOLID\n";
     return 1;
   }
 
-  if (aS.ShapeType()!=TopAbs_SOLID) {
-    Sprintf(sbf, " Shape type must be SOLID\n");
-    di<<sbf;
+  gp_Pnt aP (8., 9., 10.);
+  if (!DrawTrSurf::GetPoint (theArgVec[2], aP))
+  {
+    theDi << " Null Point is not allowed here\n";
     return 1;
   }
-  //
-  Standard_Real aTol=1.e-7;
-  TCollection_AsciiString sIN("IN"), sOUT("OUT of"), sON("ON"), sUNKNOWN("UNKNOWN");
-  TopAbs_State aState = TopAbs_UNKNOWN;
-  gp_Pnt aP(8., 9., 10.);
+  const Standard_Real aTol = (theArgNb == 4) ? Draw::Atof (theArgVec[3]) : 1.e-7;
 
-  if (!DrawTrSurf::GetPoint(a[2], aP) ) {
-    Sprintf(sbf, " Null Point is not allowed here\n");
-    di<<sbf;
-    return 1;
-  }
+  BRepClass3d_SolidClassifier aSC (aS);
+  aSC.Perform (aP, aTol);
 
-  aTol=1.e-7;
-  if (n==4) {
-    aTol=Draw::Atof(a[3]);
+  switch (aSC.State())
+  {
+    case TopAbs_IN:      theDi << "The point is IN shape\n";      return 0;
+    case TopAbs_OUT:     theDi << "The point is OUT of shape\n";  return 0;
+    case TopAbs_ON:      theDi << "The point is ON shape\n";      return 0;
+    case TopAbs_UNKNOWN:
+    default:             theDi << "The point is UNKNOWN shape\n"; return 0;
   }
-  //
-  BRepClass3d_SolidClassifier aSC(aS);
-  aSC.Perform(aP,aTol);
-  //
-  aState = aSC.State();
-  //
-  Sprintf(sbf, "The point is "); di<<sbf;
-  //
-  switch (aState) {
-  case TopAbs_IN:
-    Sprintf(sbf, sIN.ToCString());
-    break;
-  case TopAbs_OUT:
-    Sprintf(sbf, sOUT.ToCString());
-    break;
-  case TopAbs_ON:
-    Sprintf(sbf, sON.ToCString());
-    break;
-  case TopAbs_UNKNOWN:
-    Sprintf(sbf, sUNKNOWN.ToCString());
-    break;
-  default:
-    Sprintf(sbf, sUNKNOWN.ToCString());
-    break;
-  }
-  di<<sbf;
-	//
-  Sprintf(sbf, " shape\n");
-  di<<sbf;
-
-  return 0;
 }
 
 #include <OSD_Process.hxx>
diff --git a/src/QABugs/QABugs_3.cxx b/src/QABugs/QABugs_3.cxx
index 4989942051..26db4c9bcd 100644
--- a/src/QABugs/QABugs_3.cxx
+++ b/src/QABugs/QABugs_3.cxx
@@ -17,7 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
 #include <QABugs.hxx>
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -35,6 +34,8 @@
 #include <Standard_ErrorHandler.hxx>
 #include <tcl.h>
 
+#include <fstream>
+
 static int BUC60623(Draw_Interpretor& di, Standard_Integer argc, const char ** a)
 {
   if(argc!=4)
@@ -1365,59 +1366,64 @@ static Standard_Integer BUC60856(Draw_Interpretor& di, Standard_Integer /*argc*/
   return 0;
 }
 
-//#include <fstream.h>
-#ifdef HAVE_FSTREAM
-# include <fstream>
-#elif defined (HAVE_FSTREAM_H)
-# include <fstream.h> 
-#endif
-//#include <Standard_Stream.hxx>
 //==========================================================================
 //function : CoordLoad
 //           chargement d une face dans l explorer.
 //==========================================================================
-static Standard_Integer coordload (Draw_Interpretor& di, Standard_Integer argc, const char ** argv)
+static Standard_Integer coordload (Draw_Interpretor& theDi,
+                                   Standard_Integer  theArgsNb,
+                                   const char**      theArgVec)
 { 
-  char line[256];
-  char X[30], Y[30];
-  int fr;
-  TopoDS_Vertex V1,V2;
-  TopoDS_Edge Edge;
-  TopoDS_Wire Wire;
-  TopoDS_Face Face;
-
-  if (argc < 3) return 1;
-
-  ifstream file(argv[2], ios::in);
-  if(!file)
-    {
-      di<<"unable to open "<<argv[2]<<" for input"<<"\n";
-      return 2;
-    }
-  BRepBuilderAPI_MakeWire WB;
-
-  file.getline(line,80);
-  for(int i=0;i<30;i++) X[i]=Y[i]=0;
-  fr = sscanf(line,"%20c%20c",&X,&Y);
-  V1 = BRepBuilderAPI_MakeVertex(gp_Pnt(Draw::Atof(X),Draw::Atof(Y),0.0));
-
-  for(;;)
-    {
-      file.getline(line,80);
-      if (!file) break;
-	  for(int i=0;i<30;i++) X[i]=Y[i]=0;
-	  fr = sscanf(line,"%20c%20c",&X,&Y);
-	  V2 = BRepBuilderAPI_MakeVertex(gp_Pnt(Draw::Atof(X),Draw::Atof(Y),0.0));
-	  Edge = BRepBuilderAPI_MakeEdge(V1,V2);
-	  WB.Add(Edge);
-	  V1=V2;
+  if (theArgsNb < 3)
+  {
+    return 1;
   }
-  
-  file.close();
-  if (WB.IsDone()) Wire = WB.Wire();
-  Face = BRepBuilderAPI_MakeFace(Wire);
 
-  DBRep::Set (argv[1],Face);
+  std::ifstream aFile (theArgVec[2], ios::in);
+  if (!aFile)
+  {
+    theDi << "unable to open " << theArgVec[2] << " for input\n";
+    return 2;
+  }
+
+  char aLine[80];
+  memset (aLine, 0, 40);
+  aFile.getline (aLine, 80);
+
+  gp_Pnt aPnt (0.0, 0.0, 0.0);
+  aLine[40] = '\0';
+  aPnt.SetY (Draw::Atof (&aLine[20]));
+  aLine[20] = '\0';
+  aPnt.SetX (Draw::Atof (aLine));
+  TopoDS_Vertex aVert1 = BRepBuilderAPI_MakeVertex (aPnt);
+  BRepBuilderAPI_MakeWire aMakeWire;
+  for (;;)
+  {
+    memset (aLine, 0, 40);
+    aFile.getline (aLine, 80);
+    if (!aFile)
+    {
+      break;
+    }
+
+    aLine[40] = '\0';
+    aPnt.SetY (Draw::Atof (&aLine[20]));
+    aLine[20] = '\0';
+    aPnt.SetX (Draw::Atof (aLine));
+    TopoDS_Vertex aVert2 = BRepBuilderAPI_MakeVertex (aPnt);
+    aMakeWire.Add (BRepBuilderAPI_MakeEdge (aVert1, aVert2));
+    aVert1 = aVert2;
+  }
+  aFile.close();
+
+  if (!aMakeWire.IsDone())
+  {
+    DBRep::Set (theArgVec[1], TopoDS_Face());
+    return 0;
+  }
+
+  BRepBuilderAPI_MakeFace aMakeFace (aMakeWire.Wire());
+  DBRep::Set (theArgVec[1], aMakeFace.IsDone() ? aMakeFace.Face() : TopoDS_Face());
   return 0;
 }
 
diff --git a/src/Standard/Standard_TypeDef.hxx b/src/Standard/Standard_TypeDef.hxx
index 6744201488..99551ee05f 100755
--- a/src/Standard/Standard_TypeDef.hxx
+++ b/src/Standard/Standard_TypeDef.hxx
@@ -30,6 +30,29 @@
   #include <stdint.h>
 #endif
 
+#if(defined(_MSC_VER) && (_MSC_VER < 1800))
+  // only Visual Studio 2013 (vc12) provides <cinttypes> header
+  // we do not defined all macros here - only used by OCCT framework
+  #ifdef _WIN64
+    #define PRIdPTR "I64d"
+    #define PRIuPTR "I64u"
+    #define SCNdPTR "I64d"
+    #define SCNuPTR "I64u"
+  #else
+    #define PRIdPTR "d"
+    #define PRIuPTR "u"
+    #define SCNdPTR "d"
+    #define SCNuPTR "u"
+  #endif
+#else
+  // should be just <cinttypes> since C++11
+  // however we use this code for compatibility with old C99 compilers
+  #ifndef __STDC_FORMAT_MACROS
+    #define __STDC_FORMAT_MACROS
+  #endif
+  #include <inttypes.h>
+#endif
+
 #define Standard_False (Standard_Boolean)0
 #define Standard_True  (Standard_Boolean)1
 
@@ -37,19 +60,20 @@
 #include <Standard_Macro.hxx>
 #endif
 
-typedef int Standard_Integer;
-typedef double Standard_Real;
-typedef unsigned int Standard_Boolean;
-typedef float Standard_ShortReal;
-typedef char  Standard_Character;
-typedef short Standard_ExtCharacter;
-typedef unsigned char  Standard_Byte;
-typedef void* Standard_Address;
-typedef size_t Standard_Size;
+typedef int           Standard_Integer;
+typedef double        Standard_Real;
+typedef unsigned int  Standard_Boolean;
+typedef float         Standard_ShortReal;
+typedef char          Standard_Character;
+typedef short         Standard_ExtCharacter;
+typedef unsigned char Standard_Byte;
+typedef void*         Standard_Address;
+typedef size_t        Standard_Size;
+typedef std::time_t   Standard_Time;
 
 //
-typedef const char*  Standard_CString;
-typedef const short* Standard_ExtString;
+typedef const char*   Standard_CString;
+typedef const short*  Standard_ExtString;
 
 // Unicode primitives, char16_t, char32_t
 typedef char          Standard_Utf8Char;     //!< signed   UTF-8 char
@@ -58,6 +82,4 @@ typedef uint16_t      Standard_Utf16Char;    //!< UTF-16 char (always unsigned)
 typedef uint32_t      Standard_Utf32Char;    //!< UTF-32 char (always unsigned)
 typedef wchar_t       Standard_WideChar;     //!< wide char (unsigned UTF-16 on Windows platform and signed UTF-32 on Linux)
 
-typedef std::time_t Standard_Time;
-
-#endif
+#endif // _Standard_TypeDef_HeaderFile
diff --git a/src/VrmlData/VrmlData_Scene.cxx b/src/VrmlData/VrmlData_Scene.cxx
index b5d11dd1a8..b82cf5f420 100755
--- a/src/VrmlData/VrmlData_Scene.cxx
+++ b/src/VrmlData/VrmlData_Scene.cxx
@@ -17,7 +17,6 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
-
 #include <VrmlData_Scene.hxx>
 #include <VrmlData_InBuffer.hxx>
 #include <VrmlData_Appearance.hxx>
@@ -1132,8 +1131,10 @@ void dumpNode (Standard_OStream&                theStream,
     const Standard_Integer ** ppDummy; 
     const Standard_Size nCoord = aNode->Coordinates()->Length();
     const Standard_Size nPoly  = aNode->Polygons (ppDummy);
-    char buf[64];
-    Sprintf (buf, "IndexedFaceSet (%d vertices, %d polygons)", nCoord, nPoly);
+    char buf[80];
+    Sprintf (buf, "IndexedFaceSet (%" PRIuPTR " vertices, %" PRIuPTR " polygons)",
+             nCoord, nPoly);
+
     dumpNodeHeader (theStream, theIndent, buf, theNode->Name());
   } else if (theNode->IsKind(STANDARD_TYPE(VrmlData_IndexedLineSet))) {
     const Handle(VrmlData_IndexedLineSet) aNode =
@@ -1141,8 +1142,11 @@ void dumpNode (Standard_OStream&                theStream,
     const Standard_Integer ** ppDummy; 
     const Standard_Size nCoord = aNode->Coordinates()->Length();
     const Standard_Size nPoly  = aNode->Polygons (ppDummy);
-    char buf[64];
-    Sprintf (buf, "IndexedLineSet (%d vertices, %d polygons)", nCoord, nPoly);
+
+    char buf[80];
+    Sprintf(buf, "IndexedLineSet (%" PRIuPTR " vertices, %" PRIuPTR " polygons)",
+            nCoord, nPoly);
+
     dumpNodeHeader (theStream, theIndent, buf, theNode->Name());
   } else if (theNode->IsKind(STANDARD_TYPE(VrmlData_Material))) {
 //     const Handle(VrmlData_Material) aMaterial =