How Can i Do Differentiation in C Programming language ???????????

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How Can i Do Differentiation in C Programming language ???????????
double f_prime_at_x( double (*f)(double x), double x)


{


return (f(x+0.01) - f(x) / 0.01);


}





to csanon: see this link: http://www.newty.de/fpt/fpt.html#call





And indeed it is not optimal, but I think it is dishonorable to give away full source code to people when they haven't shown any effort at an optimal solution to begin with.
Reply:http://www.nrbook.com/a/bookcpdf.php





Look up numerical derivatives. The above answer's solution seems logical, but it's not optimal.





Also, to above answerer, check your use of function pointers. It's (*f) when calling it, as in (*f)(x).

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