square root function

Im wondering how do I get the square root of a number in C. Can any body help. Thanx

>Im wondering how do I get the square root of a number in C.
The easiest way would be the sqrt() function in math.h.

-Prelude

Example:

Code:

---

#include <stdio.h>
#include <math.h>
int main()
{
        printf(sqrt(20));
        return 0;
}

---

-Luke

> printf(sqrt(20));
First parameter to printf is a string

printf( "%f\n", sqrt(20));

You could also easily write your own by using Newton's method of successive approximations.

or use a very simple ( time consuming ) method:

use a loop using long doubles and do a comparison of number * number to equal the desired number. a very basic approach. this will have some trouble with some numbers, though. didn't test it yet.

- toaster

>use a loop using long doubles and do a comparison of number * number to equal the desired number. a very basic approach.

While your at it, you could reinvent the wheel.

haha. no.

This is my favourite math reference:

http://mathworld.wolfram.com/SquareRootAlgorithms.html