Why this also works in C ??? Array memory should be allocated at run time ???

Question

https://code.sololearn.com/c6IzK70G9EZ4/?ref=app

Answer 1

It doesn't work. n needs to be a constant expression. Just because the compiler doesn't show a warning or an error doesn't mean that the syntax is correct

Answer 2

Take a look here:

https://en.m.wikipedia.org/wiki/Variable-length_array