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 <kliat...@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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