Merge topic 'cmake-tutorial'

6f6a32a0f6 Tutorial: Improve Step 9
6a35d630dc Tutorial: Improve Step 8
61d4d990d6 Tutorial: Improve Step 7
a36731c634 Tutorial: Improve Step 6
df9cdf629c Tutorial: Improve Step 5
442c0f0d46 Tutorial: Improve Step 4
bc64401c3d Tutorial: Improve Step 3
49ce4d6ff4 Tutorial: Improve Step 2
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3528

1 files changed, 2 insertions, 11 deletions

diff --git a/Help/guide/tutorial/Step9/MathFunctions/mysqrt.cxx b/Help/guide/tutorial/Step9/MathFunctions/mysqrt.cxx
index 8b82141..2ae60c6 100644
--- a/Help/guide/tutorial/Step9/MathFunctions/mysqrt.cxx
+++ b/Help/guide/tutorial/Step9/MathFunctions/mysqrt.cxx
@@ -4,8 +4,6 @@
 // include the generated table
 #include "Table.h"
 
-#include <cmath>
-
 // a hack square root calculation using simple operations
 double mysqrt(double x)
 {
@@ -13,20 +11,13 @@ double mysqrt(double x)
     return 0;
   }
 
-  // if we have both log and exp then use them
-#if defined(HAVE_LOG) && defined(HAVE_EXP)
-  double result = exp(log(x) * 0.5);
-  std::cout << "Computing sqrt of " << x << " to be " << result << " using log"
-            << std::endl;
-#else
   // use the table to help find an initial value
   double result = x;
   if (x >= 1 && x < 10) {
+    std::cout << "Use the table to help find an initial value " << std::endl;
     result = sqrtTable[static_cast<int>(x)];
   }
 
-  // if we have both log and exp then use them
-
   // do ten iterations
   for (int i = 0; i < 10; ++i) {
     if (result <= 0) {
@@ -36,6 +27,6 @@ double mysqrt(double x)
     result = result + 0.5 * delta / result;
     std::cout << "Computing sqrt of " << x << " to be " << result << std::endl;
   }
-#endif
+
   return result;
 }