Tests: Update CMake tutorial

Latest material from data.kitware.com -> Collections -> Courses -> CMake.

2 files changed, 10 insertions, 20 deletions

diff --git a/Tests/Tutorial/Step4/MathFunctions/CMakeLists.txt b/Tests/Tutorial/Step4/MathFunctions/CMakeLists.txt
index f386036..0515852 100644
--- a/Tests/Tutorial/Step4/MathFunctions/CMakeLists.txt
+++ b/Tests/Tutorial/Step4/MathFunctions/CMakeLists.txt
@@ -1,4 +1,7 @@
 add_library(MathFunctions mysqrt.cxx)
 
-install (TARGETS MathFunctions DESTINATION bin)
-install (FILES MathFunctions.h DESTINATION include)
+# state that anybody linking to us needs to include the current source dir
+# to find MathFunctions.h, while we don't.
+target_include_directories(MathFunctions
+          INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
+          )
diff --git a/Tests/Tutorial/Step4/MathFunctions/mysqrt.cxx b/Tests/Tutorial/Step4/MathFunctions/mysqrt.cxx
index 6ca264f..7d9379e 100644
--- a/Tests/Tutorial/Step4/MathFunctions/mysqrt.cxx
+++ b/Tests/Tutorial/Step4/MathFunctions/mysqrt.cxx
@@ -1,8 +1,5 @@
 #include "MathFunctions.h"
-#include "TutorialConfig.h"
-#include <stdio.h>
-
-#include <math.h>
+#include <iostream>
 
 // a hack square root calculation using simple operations
 double mysqrt(double x)
@@ -11,26 +8,16 @@ double mysqrt(double x)
     return 0;
   }
 
-  double result;
-
-// if we have both log and exp then use them
-#if defined(HAVE_LOG) && defined(HAVE_EXP)
-  result = exp(log(x) * 0.5);
-  fprintf(stdout, "Computing sqrt of %g to be %g using log\n", x, result);
-#else
-  double delta;
-  result = x;
+  double result = x;
 
   // do ten iterations
-  int i;
-  for (i = 0; i < 10; ++i) {
+  for (int i = 0; i < 10; ++i) {
     if (result <= 0) {
       result = 0.1;
     }
-    delta = x - (result * result);
+    double delta = x - (result * result);
     result = result + 0.5 * delta / result;
-    fprintf(stdout, "Computing sqrt of %g to be %g\n", x, result);
+    std::cout << "Computing sqrt of " << x << " to be " << result << std::endl;
   }
-#endif
   return result;
 }