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author | Michael Abed <michaelabed@gmail.com> | 2012-02-27 11:12:18 -0500 |
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committer | Michael Abed <michaelabed@gmail.com> | 2012-02-27 11:12:18 -0500 |
commit | 8932ac3c9881f800310e03fb147dce3261989eca (patch) | |
tree | 9336e291f283694c328933fb3ba00e6baa53acc9 /mysqrt.cpp | |
download | ec327-lab2-8932ac3c9881f800310e03fb147dce3261989eca.tar.gz ec327-lab2-8932ac3c9881f800310e03fb147dce3261989eca.tar.bz2 ec327-lab2-8932ac3c9881f800310e03fb147dce3261989eca.zip |
initial commit
Diffstat (limited to 'mysqrt.cpp')
-rw-r--r-- | mysqrt.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/mysqrt.cpp b/mysqrt.cpp new file mode 100644 index 0000000..29fedf2 --- /dev/null +++ b/mysqrt.cpp @@ -0,0 +1,21 @@ + +#include "mysqrt.h" + +using namespace std; +double mysqrt(double x) +{ + bool goodenough = false; + double guess; + double last = x / 5.0; + + if (x <= 0) + return x; + + while (!goodenough) { + guess = (last + (x / last)) / 2.0; + last = guess; + + goodenough = abs(guess - last) <= 0.000000001; + } + return guess; +} |