Passing functions as parameters 1

[mrhegemon]

I would like to be able to pass a particular function to another function so that I may call that specific function from within the function it was passed to, i.e.:

[tt]double func2(int a,long b,double c);
double *func1(long a,long b,*func2(...))
{
...;
func2(...);
..;
}[/tt]

How does one go about this?

I am trying to make a function that calculates the chi-squared gradient and hessian matrix for the coefficients of some non-linear function. I would like to be able to pass the non-linear function to the function that finds these matrices.

 

[SamBones]

I believe it's like this...

double func2(int a,long b,double c);

double *func1(long a,long b,*func2(...))
{
  double  rv;
  ...;
  rv = (* func2)(...);
  ..;
}

Or something like that.

Hope this helps.

 

[Salem]

Like so

double func2(int a,long b,double c);
double *func1(long a,long b, double (*fn)(int,long,double) )
{
  ...;
  fn(a,b,c);
  ..;
}

Which you would call like so

double *result = func1( a, b, func2 );

 

[mrhegemon]

Thank you, Salem, that was exactly what I needed.