How to get the distance between two point by using inheritance

Question

(suppose we have two points in 3D space)
dis=sqrt(((x2 - x1)^2 )+((y2 - y1)^2 )+((z2 - z1)^2 )).
more details on website:
www.cs.uregina.ca/Links/class-info/115/09-inheritance/

Answer 1

https://code.sololearn.com/cIO3rs0dRh03/?ref=app