title: How to create a mathematical curve (probably just an image) in C/C++
body: <p>Pretty much the title explains what I try to achieve.</p>
  
  <p>Having a set of points in two dimensions, I want to create somehow the curve tha passes from all these points.
  Whether it will be a graphical window with the mathematical curve or just a jpg produced, is of no importance.</p>
  
  <p>Any help? Thx!</p>