While Python does not have pointers, Python functions are objects, and they
may be passed like any other object:
def F1(x):
return x * x
def Trapeze(Fonc, left, right, step):
...code...
Y1 = Fonc(X1)
...code...
def main():
...code...
y = Trapeze(F1, -2.5, 3.2, 0.1)
...code...
Chris
On Thu, Apr 18, 2013 at 10:06 AM, abdelkader belahcene <abelahc...@gmail.com
> 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
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
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