diff options
Diffstat (limited to 'Tests/Tutorial/Step3/MathFunctions')
-rw-r--r-- | Tests/Tutorial/Step3/MathFunctions/CMakeLists.txt | 4 | ||||
-rw-r--r-- | Tests/Tutorial/Step3/MathFunctions/MathFunctions.h | 1 | ||||
-rw-r--r-- | Tests/Tutorial/Step3/MathFunctions/mysqrt.cxx | 29 |
3 files changed, 34 insertions, 0 deletions
diff --git a/Tests/Tutorial/Step3/MathFunctions/CMakeLists.txt b/Tests/Tutorial/Step3/MathFunctions/CMakeLists.txt new file mode 100644 index 0000000000..f386036c3a --- /dev/null +++ b/Tests/Tutorial/Step3/MathFunctions/CMakeLists.txt @@ -0,0 +1,4 @@ +add_library(MathFunctions mysqrt.cxx) + +install (TARGETS MathFunctions DESTINATION bin) +install (FILES MathFunctions.h DESTINATION include) diff --git a/Tests/Tutorial/Step3/MathFunctions/MathFunctions.h b/Tests/Tutorial/Step3/MathFunctions/MathFunctions.h new file mode 100644 index 0000000000..cd36bccffd --- /dev/null +++ b/Tests/Tutorial/Step3/MathFunctions/MathFunctions.h @@ -0,0 +1 @@ +double mysqrt(double x); diff --git a/Tests/Tutorial/Step3/MathFunctions/mysqrt.cxx b/Tests/Tutorial/Step3/MathFunctions/mysqrt.cxx new file mode 100644 index 0000000000..62523f69fb --- /dev/null +++ b/Tests/Tutorial/Step3/MathFunctions/mysqrt.cxx @@ -0,0 +1,29 @@ +#include <stdio.h> +#include "MathFunctions.h" + +// a hack square root calculation using simple operations +double mysqrt(double x) +{ + if (x <= 0) + { + return 0; + } + + double result; + double delta; + result = x; + + // do ten iterations + int i; + for (i = 0; i < 10; ++i) + { + if (result <= 0) + { + result = 0.1; + } + delta = x - (result*result); + result = result + 0.5*delta/result; + fprintf(stdout,"Computing sqrt of %g to be %g\n",x,result); + } + return result; +} |