diff options
Diffstat (limited to 'Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx')
-rw-r--r-- | Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx | 27 |
1 files changed, 5 insertions, 22 deletions
diff --git a/Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx b/Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx index 458ed63..7d9379e 100644 --- a/Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx +++ b/Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx @@ -1,11 +1,5 @@ #include "MathFunctions.h" -#include "TutorialConfig.h" -#include <stdio.h> - -// include the generated table -#include "Table.h" - -#include <math.h> +#include <iostream> // a hack square root calculation using simple operations double mysqrt(double x) @@ -14,27 +8,16 @@ double mysqrt(double x) return 0; } - double result; - - // if we have both log and exp then use them - double delta; - - // use the table to help find an initial value - result = x; - if (x >= 1 && x < 10) { - result = sqrtTable[static_cast<int>(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; } - return result; } |