Programming Forums > Application Development > C++

emdiesse · Oct 7th, 2004, 5:03 PM

How would i work out the squareroot of a number in C++?
Example:
The number is 25, how would i work out the sqareroot of 25 is 5 using C++?

Mjordan2nd · Oct 7th, 2004, 5:09 PM

(Toggle Plain Text)

#include <math.h>

int main(void)
{
  .........
   .........
 ...............
  double x = sqrt(25);
}

I think that should work.

emdiesse · Oct 7th, 2004, 5:28 PM

Thank you

I'm attempting to learn C++

I have decided i would make a program to work out quadratic formula questions.

I'm getting there slowly

Benoit · Oct 7th, 2004, 6:51 PM

I'm always making math programs in C.....I really need to make one that assists in my accounting homework

Infinite Recursion · Oct 7th, 2004, 11:19 PM

My professor called the square root function "squirt".... He also referred to gigabytes as "bubbabytes" I guess its a southern thing

.

sqrt() will get what ya need.

Benoit · Oct 8th, 2004, 5:24 AM

Our computer engineering teachern's name is Mr. Festchyn....We sometimes call him F Diddy B) Last year we had an electronic scrolling sign and it said 'F Diddy is the shiz'

Ashcroft · Oct 9th, 2004, 7:42 AM

If you just want the answer then use the math.h function, if you are interested in how to actually determine the square root of a number you should do a google search of "newton's method" and "square root" - writing a program that does this is one of those rites of passage you will probably do in your CS courses eventually.

Leonas · Oct 9th, 2004, 9:01 AM

Quote:

Originally posted by Ashcroft@Oct 9 2004, 12:42 PM
If you just want the answer then use the math.h function, if you are interested in how to actually determine the square root of a number you should do a google search of "newton's method" and "square root" - writing a program that does this is one of those rites of passage you will probably do in your CS courses eventually.

I think you can also go into the Math.h file and see how they did it instead of google searching the information. Im not sure if that would work but I think it is possible.

Ravilj · Oct 9th, 2004, 10:18 AM

I doubt that, I would bet its coded in assembler. You would be able to see the definition of the function but thats about it :/

Oct 7th, 2004, 5:09 PM	#2
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	(Toggle Plain Text) #include <math.h> int main(void) { ......... ......... ............... double x = sqrt(25); } #include <math.h> int main(void) { ......... ......... ............... double x = sqrt(25); } I think that should work. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Oct 7th, 2004, 6:51 PM	#4
Benoit Expert Programmer Join Date: Sep 2004 Location: Ontario, Canada Posts: 550 Rep Power: 4	I'm always making math programs in C.....I really need to make one that assists in my accounting homework __________________ Johnny was a chemist's son but Johnny is no more, for what Johnny thought was H2O was H2SO4

Oct 7th, 2004, 11:19 PM	#5
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	My professor called the square root function "squirt".... He also referred to gigabytes as "bubbabytes" I guess its a southern thing . sqrt() will get what ya need. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Oct 8th, 2004, 5:24 AM	#6
Benoit Expert Programmer Join Date: Sep 2004 Location: Ontario, Canada Posts: 550 Rep Power: 4	Our computer engineering teachern's name is Mr. Festchyn....We sometimes call him F Diddy B) Last year we had an electronic scrolling sign and it said 'F Diddy is the shiz' __________________ Johnny was a chemist's son but Johnny is no more, for what Johnny thought was H2O was H2SO4

Oct 9th, 2004, 10:18 AM	#9
Ravilj Programmer Join Date: Sep 2004 Location: JHB , South Africa Posts: 79 Rep Power: 4	I doubt that, I would bet its coded in assembler. You would be able to see the definition of the function but thats about it :/ __________________ Ravilj's OpenGL Terrain aka WinTerrain Last Updated: 17/01/2005!

Oct 7th, 2004, 5:03 PM	#1
emdiesse Programmer Join Date: Jul 2004 Location: Hampshire Posts: 56 Rep Power: 5	How would i work out the squareroot of a number in C++? Example: The number is 25, how would i work out the sqareroot of 25 is 5 using C++?

Oct 7th, 2004, 5:28 PM	#3
emdiesse Programmer Join Date: Jul 2004 Location: Hampshire Posts: 56 Rep Power: 5	Thank you I'm attempting to learn C++ I have decided i would make a program to work out quadratic formula questions. I'm getting there slowly

Oct 9th, 2004, 7:42 AM	#7
Ashcroft Programmer Join Date: Sep 2004 Posts: 38 Rep Power: 0	If you just want the answer then use the math.h function, if you are interested in how to actually determine the square root of a number you should do a google search of "newton's method" and "square root" - writing a program that does this is one of those rites of passage you will probably do in your CS courses eventually.

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Programming Forums > Application Development > C++

Squareroot