stack in c++/java

Question

i see many programing languages are stack based such is c/c++, java, js, and so on.
i know definition of stack in data structures.
but i do not know exactly what its mean in memory situations.
why its size is limit?
and why c and others is stack based while assembly and machine bytecodes are register based?

Answer 1

Martin Taylor
https://code.sololearn.com/c8pBh3U8tPKO/?ref=app
see this code.
can you explain my mistakes?!

Answer 2

Martin Taylor if system be 64bit(in my test system is 64bit)
and program store int value forward to top of memory,
third int placed in correct address and return address stored before it.

Answer 3

Martin Taylor are you forget to answer me?!