In c plus plus what is meant by stack?

Answer 1

The stack is a region of memory organized as a first-in-last-out (LIFO) structure which stores return information, parameters, and local variables. Since it is a LIFO structure, it is nested, i.e. "stacked", similar to how a stack of papers on your desk would be stacked, and if you could only deal with the top-most paper on the stack.

At the language level, C, C++, JAVA, etc., you generally do not even think about the implementation of the stack - it is just there - and it does what it needs in terms of return state, registers, parameters, and automatic or temporary variables.