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Re: equivalent to C pointer

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Thanks for answer,
but with C  we can compile the trapeze function and put it in librairy,
If we try to save the trapeze alone in  package to import it later,  I
think, I am not sure
it will be refused because F1 and sin are not define !!!     this is the
power of the C pointers !!!
the link is dynamic

thanks



On Thu, Apr 18, 2013 at 6:17 PM, Karim <kliateni@gmail.com> wrote:

>
> Hello,
>
> There is no such notion in python.
> But the closest are iterators and generator functions.
>
> Cheers
> Karim
>
>
> On 18/04/2013 19:06, abdelkader belahcene wrote:
>
>     Hi everybody,
>
>  I am new to python  and I am discovering it.
>  I know C well,
>  and want to know if python knows how to manage Pointers
>  like pointer to function  here is a C example how to write it in python
>  Intergration with trapeze method
>
>  When we write Trapeze   ( at the compilation level) we don't know which
> functions
>  Fonc  to handle.      Here for example we use  sin and a user defined  F1
>  The program is attached too
>
>     #include <stdio.h>
> #include <math.h>
>
> double F1 (double x){
>         return x*x;
> }
> double Trapeze(double Fonc(double ),
>                                 double left, double right, double step){
>   double X1, X0, Y0, Y1, Z = 0;
>   for(X0=left; X0 < right ; X0 = X0 + step) {
>     X1 = X0 + step;
>     Y1 = Fonc(X1);    Y0 = Fonc(X0);
>     Z  += (Y1 + Y0) * step * 0.5;
>   }
>    return Z;
> }
> int  main(){
>   double y;
>   y=Trapeze(sin, -2.5, 3.2, 0.1);
>   printf("\n\tValue for sin  is : \t %8.3lf ", y);
>   y=Trapeze(F1, 0, 3, 0.1);
>   printf("\n\tValue for F1 is : \t %8.3lf ", y);
>   return 0;
> }
> /**
>     Value for sin  is :         0.197
>     Value for F1 is :          9.005
>     */
>  thanks a lot
>
>
>
>

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Re: equivalent to C pointer abdelkader belahcene <abelahcene@gmail.com> - 2013-04-18 18:50 +0100
  Re: equivalent to C pointer Neil Cerutti <neilc@norwich.edu> - 2013-04-18 18:07 +0000
    Re: equivalent to C pointer Tim Chase <python.list@tim.thechases.com> - 2013-04-18 13:48 -0500

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