6 replies to this topic

[Olympiaus]

Is there a function i can use to figure the square root of numbers? i was trying to make a program for solving pythagorean theorem problems for my friend, but i can't find the square root of C haha. If its not possible let me know

btw, im a noob...

[Brandon W]

Code;

#include <math.h>
y = sqrt(x);

Description;
"sqrt" returns the square root of "x". If "x" is negative, "sqrt" returns zero and sets "errno" to EDOM.

[chili5]

Wow great help Brandon. Didn't know that you knew some C++.

Olympiaus, I wanna bring your attention to this math bits page: Math Functins in C++

It lists a bunch of mathematical functions in C++. The one you are interested in is hypot(a,b).

[Olympiaus]

thanks soooooo much

this community replies so fast haha

[PythonPower]

More generally, to find the nth root of x, use pow(x, 1.0/n).

[Brandon W]

Your welcome mate, if you need any further help just ask and we shall reply as soon as possible ;)

[TrakStar]

Our class wrote actually wrote a program that calculated it:

while (cin)
{
	if (a<=0)

cout << "******Can you please insert a positive integer!*******";
	cout << endl;

	
	break;
}

cout << endl;
do

{ //calculation to find the root
	x=(x+a/x)/2;

	cout << "The Square root of"  << " " << a << " " << "is" << " " << x <<endl;
}
//parameter for when to stop calculation
while (x-a/x>=0.000001);

Edited by WingedPanther, 30 April 2009 - 07:07 AM.
add code tags (the # button)