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begeekmyfriend · begeekmyfriend · commit 10dee4990871 · 2020-08-08T17:02:37.000+08:00
Signed-off-by: begeekmyfriend &lt;begeekmyfriend@gmail.com&gt;
diff --git a/069_sqrt/sqrt.c b/069_sqrt/sqrt.c
@@ -29,7 +29,8 @@ static double mySqrt(double n)
     /* f(x) = (x - x0)f'(x0) - f(x0) = 0 First order of Tylor series */
     double x = 1.0;
     while (fabs(x * x - n) > 1e-8) {
-        x = x - (x * x - n) / (2 * x);
+        // x = x - (x * x - n) / (2 * x);
+        x = (x - n / x) / 2;
     }
     return x;
 }

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,8 @@ static double mySqrt(double n)`
`29`	`29`	`/* f(x) = (x - x0)f'(x0) - f(x0) = 0 First order of Tylor series */`
`30`	`30`	`double x = 1.0;`
`31`	`31`	`while (fabs(x * x - n) > 1e-8) {`
`32`		`- x = x - (x * x - n) / (2 * x);`
	`32`	`+ // x = x - (x * x - n) / (2 * x);`
	`33`	`+ x = (x - n / x) / 2;`
`33`	`34`	`}`
`34`	`35`	`return x;`
`35`	`36`	`}`