when there are so many switch and if Sentence , make me confusion
so is there a tool as below…
i cant upload pic , so draw it

if (…)
…switch()
…case():
…|x|
|x| … |x|
|x| …case():
|x| .
|x|
.
… case():
.
.
.
else

hard to draw it
the |x| is this longitudinal notes for conditional statements.
and |x| float with screen,so coders could know which state they are…