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Merge topic 'step5'

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fc2d1b1347 Tutorial: Clarify Step 5

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4231
This commit is contained in:
Brad King
2020-01-17 14:42:26 +00:00
committed by Kitware Robot
parent a7fca06c46 fc2d1b1347
commit 93d4148612
1 changed files with 10 additions and 4 deletions
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Help/guide/tutorial/index.rst
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@@ -397,16 +397,22 @@ from ``mysqrt.cxx``:
#cmakedefine HAVE_LOG
#cmakedefine HAVE_EXP
Modify ``mysqrt.cxx`` to include cmath. Next, in that same file in the
``mysqrt`` function we can provide an alternate implementation based on
``log`` and ``exp`` if they are available on the system using the following
code (don't forget the ``#endif`` before returning the result!):
If ``log`` and ``exp`` are available on the system, then we will use them to
compute the square root in the ``mysqrt`` function. Add the following code to
the ``mysqrt`` function in ``MathFunctions/mysqrt.cxx`` (don't forget the
``#endif`` before returning the result!):
.. literalinclude:: Step6/MathFunctions/mysqrt.cxx
:language: c++
:start-after: // if we have both log and exp then use them
:end-before: // do ten iterations
We will also need to modify ``mysqrt.cxx`` to include ``cmath``.
.. literalinclude:: Step6/MathFunctions/mysqrt.cxx
:language: c++
:end-before: #include <iostream>
Run the :manual:`cmake <cmake(1)>` executable or the
:manual:`cmake-gui <cmake-gui(1)>` to configure the project and then build it
with your chosen build tool and run the Tutorial executable.