Skrevet av Emne: Programming: How to calculate pi  (Lest 1979 ganger)

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Programming: How to calculate pi
« på: 27. ſeptember 2008, 18:24 pm »
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  • Not every programming environment has a constant for pi defined. How can this value be calculated?



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    [Solved] Programming: How to calculate pi
    « Svar #1 på: 27. ſeptember 2008, 18:24 pm »
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  • If you have functions for basic trigonometry available, you can use the following formula:

    pi = 4 * atan(1.0)

    The atan() function returns the arc tangent in radians and the value is mathematically defined to be between -PI/2 and PI/2 (inclusive).

    See "man 3 atan" for more info.