Making quadrat on c programming language

This is a discussion on Making quadrat on c programming language within the C Programming forums, part of the General Programming Boards category; Does anybody know how to make a quadrat on a number or variabel? I searching it on anyweb but i ...

  1. #1
    Registered User loserone+_+'s Avatar
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    Making quadrat on c programming language

    Does anybody know how to make a quadrat on a number or variabel? I searching it on anyweb but i didnt find the solution, please help! I wanna making a math calculation using c programming and by myself quadrat is vital thing i must know ......
    sorry for my bad english

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    What is a quadrat?

    Do you maybe mean a square root (Square Roots) or a square (x2)?

    Code:
    #include <math.h>
    
    void test(void)
    {
       double res = sqrt(x); 
    }
    sqrt - C++ Reference

    For x2 you may as well just do x*x. For xn

    Code:
    #include <math.h>
    
    void test(void)
    {
       double res = pow(x, n); 
    }
    pow - C++ Reference

    Sorry if I misunderstood your question. If you do actually mean this: Quadrat - Wikipedia, the free encyclopedia then no I don't have a clue how to represent it in C

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    Quadrat - Wikipedia, the free encyclopedia ? You do kind of have to be careful to know what you want, or you risk communicating a different idea. What are you doing again?

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    Registered User loserone+_+'s Avatar
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    yeah that is what i mean
    in my country language, square root are called kuadrat, so i think kuadrat = quadrat = square root
    what if x with square root 3 or more?
    and must we using double res = pow(x, n);

    Quote Originally Posted by smokeyangel View Post
    What is a quadrat?

    Do you maybe mean a square root (Square Roots) or a square (x2)?

    Code:
    #include <math.h>
    
    void test(void)
    {
       double res = sqrt(x); 
    }
    sqrt - C++ Reference

    For x2 you may as well just do x*x. For xn

    Code:
    #include <math.h>
    
    void test(void)
    {
       double res = pow(x, n); 
    }
    pow - C++ Reference

    Sorry if I misunderstood your question. If you do actually mean this: Quadrat - Wikipedia, the free encyclopedia then no I don't have a clue how to represent it in C

  5. #5
    Registered User loserone+_+'s Avatar
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    sorry, i didnt know the correct english for square root,

    Quote Originally Posted by whiteflags View Post
    Quadrat - Wikipedia, the free encyclopedia ? You do kind of have to be careful to know what you want, or you risk communicating a different idea. What are you doing again?

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    ok so you want the square root and thats it, or do you want other roots, like cube root (cubed root of 27 = 3 meaning 3*3*3)

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    Registered User whiteflags's Avatar
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    what if x with square root 3 or more?
    A cube root or nth root can be expressed mathematically as raising to a fractional power n^(1/3) or n^(1/6) for example. So use pow.

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    Registered User loserone+_+'s Avatar
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    yeahhh, thats it.
    not only cube root, more of it i will use that
    like 64 = 2 meaning 2*2*2*2*2*2

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    Registered User loserone+_+'s Avatar
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    Quote Originally Posted by whiteflags View Post
    So use pow.
    i see that! by the way what is that "pow" acronym?
    and how i use it with a simple code?
    when i see "double res" thing, it makes me confused,
    must it exist before pow or doesnt must?

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    yeah go with what WhiteFlags said

    Code:
    double res = pow(x, (1/n));
    is the same as
    Code:
    double res;
    res = pow(x, (1/n));
    where x is your whole number, and the n is the # of roots

    ie x=27 n=3 res would =3, or x=64 n=6 res would be n=6 res would be 2.

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    Quote Originally Posted by Crossfire View Post
    yeah go with what WhiteFlags said

    Code:
    double res = pow(x, (1/n));
    is the same as
    Code:
    double res;
    res = pow(x, (1/n));
    where x is your whole number, and the n is the # of roots

    ie x=27 n=3 res would =3, or x=64 n=6 res would be n=6 res would be 2.
    hemm,
    is that "x" thing, are declared variables by using int, float?
    and "n" thing are constant?
    res = result, right?
    if i wanna print to the screen, would it be like this,
    printf("The Result %d", res);

  12. #12
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    you can have the "user" give both X and N, so they could choose regular square root of 9(x=9 n=2), or cubed root of 27 (x=27 n=3) quad root of 1296 (x=1296 n=4) ect

    yes x, n, res all variables
    x = big number
    n = #of roots
    res = result

    and make sure to have all doubles, so you get the decimals if not a true root, either that or use type casting to divide and get the decimals
    Last edited by Crossfire; 12-29-2012 at 07:09 AM.

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    The best thing is to use doubles for all the numbers. It causes the least trouble. Values like 1.0 / 3.0 require the places after the decimal point too.

    The only thing you don't seem to know is that pow is a function from math.h. Might want to review your C book!

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    Registered User loserone+_+'s Avatar
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    yeah i know, pow function is a function from math.h
    by the way, i know to use sqrt using header math.h
    but i didnt know how to make square root.
    doubles are both of int and float right? cool

  15. #15
    Registered User whiteflags's Avatar
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    doubles are both of int and float right? cool
    Doubles are basically the same as floats, just bigger. Integers have nothing to do with either float or double.

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