multithreading - How to "multithread" C code

Question

I have a number crunching application written in C. It is kind of a main loop that for each value calls, for increasing values of "i", a function that performs some calculations. I read about multithreading, and I am considering learning a bit about it, in C. I wonder if somehow general code like mine could be automatically multithreaded and how.

Thanks

P.D. To get an idea about my code, let's say that it is something like this:

main(...)
for(i=0;i<=ntimes;i++)get_result(x[i],y[i],result[i]);

...

void get_result(float x,float y,float result){
  result=sqrt(log (x) + log (y) + cos (exp (x + y));
(and some more similar mathematical operations)
}

Answer 1

If the task is highly parallelizable and your compiler is modern, you could try OpenMP. http://en.wikipedia.org/wiki/OpenMP