Merge branch 'Fix_ISO_C++_Warning' into 'master'

Fix iso c++ warning

See merge request !72

src/Cxx/Plotting/LinePlot.cxx

@@ -61,9 +61,9 @@ int main(int, char*[])
 
   // For dotted line, the line type can be from 2 to 5 for different dash/dot
   // patterns (see enum in vtkPen containing DASH_LINE, value 2):
-#ifndef WIN32
-  line->GetPen()->SetLineType(vtkPen::DASH_LINE);
-#endif
+  // #ifndef WIN32
+  //   line->GetPen()->SetLineType(vtkPen::DASH_LINE);
+  // #endif
   // (ifdef-ed out on Windows because DASH_LINE does not work on Windows
   //  machines with built-in Intel HD graphics card...)
 

src/Cxx/Plotting/PieChart.cxx

@@ -17,8 +17,8 @@ namespace {
 constexpr int NUM_ITEMS = 5;
 constexpr int data[] = {77938, 9109, 2070, 12806, 19514};
 // constexpr int data[] = {200,200,200,200,200};
-constexpr char* labels[] = {"Books", "New and Popular", "Periodical",
-                            "Audiobook", "Video"};
+std::string labels[] = {"Books", "New and Popular", "Periodical", "Audiobook",
+                        "Video"};
 } // namespace
 
 int main(int, char*[])

src/Cxx/Plotting/StackedPlot.cxx

-#include <vtkRenderer.h>
-#include <vtkRenderWindow.h>
-#include <vtkSmartPointer.h>
-#include <vtkChartXY.h>
-#include <vtkPlot.h>
 #include <vtkAxis.h>
-#include <vtkPlotStacked.h>
+#include <vtkChartXY.h>
 #include <vtkColor.h>
 #include <vtkColorSeries.h>
-#include <vtkTable.h>
-#include <vtkIntArray.h>
-#include <vtkDoubleArray.h>
-#include <vtkStringArray.h>
-#include <vtkContextView.h>
 #include <vtkContextScene.h>
-#include <vtkRenderWindowInteractor.h>
+#include <vtkContextView.h>
+#include <vtkDoubleArray.h>
+#include <vtkIntArray.h>
 #include <vtkNamedColors.h>
 #include <vtkNew.h>
+#include <vtkPlot.h>
+#include <vtkPlotStacked.h>
+#include <vtkRenderWindow.h>
+#include <vtkRenderWindowInteractor.h>
+#include <vtkRenderer.h>
+#include <vtkStringArray.h>
+#include <vtkTable.h>
 
 namespace {
 // Monthly checkout data
-constexpr char *month_labels[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-                                     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+std::string month_labels[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+                              "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 constexpr int book[] = {5675, 5902, 6388, 5990, 5575, 7393,
                         9878, 8082, 6417, 5946, 5526, 5166};
 constexpr int new_popular[] = {701, 687, 736, 696, 750, 814,