How to draw functions in C++

Question

I would like to create charts of functions in C++. Can anyone help me in getting started ? Let's suppose I want to draw the function y=x ( it is a straight line passing through the points (0,0) (1,1) (2,2) ..... (20,20) etc. ) How could I do it ? ( If you also suggest how to draw the y & x axes it is even better ) Sorry but it is not on books ( good texts recommendations are welcome, by the way :-) C++ ) and on the net there are references mainly to game graphics. The only serious reference to my problem I was able to find is this: somewhat related question asked in this very forum ( God bless, we have stackoverflow ! )

Answer 1

I would consider two options:

• If you want to do everything in C++, you will probably need an external library. OpenGL is a solution, there is also Qt, which is probably easier to learn and larger (and more powerful).
• If you can afford to output a file and read it with another program, the easiest way is to simply write an ASCII file with the coordinates of the points and plot is with Octave (free).