c - What happens to a function's stack when it returns? -


this question has answer here:

#include <stdio.h>  void function() {     int stackvar = 10;     printf("stack variable = %d\n", stackvar); }  int main(void) {     function();     return 0; }

what happens stack frame of function when returns?

firstly, you've edited question dramatically, other answers (somewhat unfairly) no longer relevant. still, answer current question:

what happens stack frame of function when returns?

it seems me lack general feel how stack operates. - going bit crazy here - try analogy might make "click". can imagine stack frame being waves on beach. more nested function calls get, , more data functions have in parameters , local variables, more memory in use. that's waves reaching further beach. scopes exit memory released - use memory put forgotten. waves recede. still, throughout lifetime of program different sequences of functions enter , exit, same memory (level of beach) reused (under water) , forgotten (not under water). bits furthest beach tend covered least , short durations, while stays underwater until weakest point of low tide... things recursive functions aren't tail-recursion optimised can use lot of memory briefly, stack variables created directly in main() stay there until program termination.


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