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-rw-r--r--Tests/Tutorial/Step5/MathFunctions/mysqrt.cxx27
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;
}