Introduction - If you have any usage issues, please Google them yourself
Bright circumference of a circle connecting between the chord line. Distributed computing on the circumference of the park there are N points, how many strings? String calculation drawing program functional requirements (a) Draw a large circle (2) distributed on the circumference in turn 2 to 20 points in the chord drawn between any two points. (3) Draw painterly effects, and calculate and display the number of strings. (4) If starting from a certain point, you can build a graphic you draw this? Remember, during the drawing process can be repeated after a point, but you can not redraw the edges.