Can you help me about this problem at OpenGl ?

Question

I draw some shapes and the problem is the edges of the drawing look like a zigzag and I am sure my points are right if anyone can help me with that I would be grateful and here is the OpenGL code

in the code you can check the comments and find // quad three also // quad seven

https://code.sololearn.com/cuJG4ffMtilM/?ref=app

Answer 1

Sololearn don't support it