3 replies to this topic

[Aereshaa]

This is a function that returns the sum of all outputs from a function f, for all integers from m to n:

double summf(int m, int n, double (*f)(int)){

 double t = 0.0;

 int i = m;

 while(i != n)

  t += (*f)(i++);

 return t;

}

Here is one that gives the summation of an array of doubles:

double summa(int n, double * a){

 double t = 0.0;

 int i = 0;

 while(i != n)

  t += a[i++];

 return t;

}

And finally, here is one that applies a function to the elements of an array:

double summaf(int n, double * a, double (*f)(double)){

 double t = 0.0;

 int i = m;

 while(i != n)

  t += (*f)(a[i++]);

 return t;

}

What do you think?

[Brandon W]

What language? And do they all go into the one file or not?

[Aereshaa]

These summation functions are in C. The idea is that you pass a pointer to a function or array, and it does the sum of the results from passing m to n. Here:

[Brandon W]

Oh, nice work mate :) Thanks for clearing it up Aere.