Tutorial: Refactor MathFunctions code

Propagate the refactor in Step 10 MathFunctions through all of the
steps. Use MathFunctions/MathFunctions.cxx instead of Tutorial.cxx
to determine which sqrt library is called. Adds .h files which
correspond to their .cxx files by name.

1 files changed, 15 insertions, 0 deletions

diff --git a/Help/guide/tutorial/Step2/MathFunctions/MathFunctions.cxx b/Help/guide/tutorial/Step2/MathFunctions/MathFunctions.cxx
new file mode 100644
index 0000000000..781d0ecc4e
--- /dev/null
+++ b/Help/guide/tutorial/Step2/MathFunctions/MathFunctions.cxx
@@ -0,0 +1,15 @@
+#include "MathFunctions.h"
+
+// TODO 11: include cmath
+
+// TODO 10: Wrap the mysqrt include in a precompiled ifdef based on USE_MYMATH
+#include "mysqrt.h"
+
+namespace mathfunctions {
+double sqrt(double x)
+{
+  // TODO 9: If USE_MYMATH is defined, use detail::mysqrt.
+  // Otherwise, use std::sqrt.
+  return detail::mysqrt(x);
+}
+}