Menu shapes in openGL

Question

Hello how are you guys? I wrote a code that shows a different shapes to the user and i set it as a menu so in the output window the user have different shapes to choose but the problem is the shapes it doesn’t show off I don’t know why so plz guys i need your help , thank you.
https://code.sololearn.com/cEawTtBmAyE0/?ref=app

Answer 1

You cannot use any graphics libraries in Sololearn C++ playground, only console.
And please do not tag languages like Java or Python, if they are irrelevant to your question.

Answer 2

After each change you have to clear the window and then draw with the new data.