Example Issue: Sum A+B

[RodionGork]

// the first comment contains original fragment

You are to add two numbers and tell their sum. Though you can do it manually, try to write a simple program in any
programming language you know or like or want to learn.

Sequence of steps described below is demonstrated by this screencast video
or with pictures in the demo pages.

[RodionGork]

// the second comment contains improvement suggestion

You are to sum two numbers. Though you can do it manually, try to write a simple program in any
programming language you know, or like, or want to learn.

See this screencast video for visualisation of the steps described below. Or refer to pictures in the demo pages.