Square Root

This is a discussion on Square Root within the C++ Programming forums, part of the General Programming Boards category; How would I get the square root in C++, do I have to use a function or something? I am ...

  1. #1
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    Square Root

    How would I get the square root in C++, do I have to use a function or something? I am using it for A*A + B*B = C*C, but I want to square root C so it is just C (this is the Pythagoreum Therom if I am not mistaken, except that it uses square root signs, the little 2s, but I don't know how to make them ). Any help is appreciated and needed.

  2. #2
    Registered User billholm's Avatar
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    Lightbulb

    Yeah there's a function for that:

    Prototype: double sqrt(double num);
    Header file: math.h

    PHP Code:
    /*Start of code*/

    #include <math.h>
    #include <iostream.h>

    int main(void
    {
      
    double num 9.0;

      
    cout << "The square root of " << num << "is " << sqrt(num);
      return 
    0;
    }

    /*End of code*/ 
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  3. #3
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    Great, thanks tons. That will help me out alot.
    "Um...well..."
    -Kyoto Oshiro

  4. #4
    Registered User billholm's Avatar
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    Sure! Any time
    All men are created equal. But some are more equal than others.

    Visit me at http://www.angelfire.com/my/billholm

  5. #5
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    You could also use this:
    double pow(double x,double y);
    It raises x to the power of y, and returns the result.
    Include math.h
    e.g. pow(number,0.5);

  6. #6
    Registered User billholm's Avatar
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    Yeah that too
    All men are created equal. But some are more equal than others.

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