FA> Could someone tell or show me how to free dynamically allocated 
FA> memory in one function from another function or main ?

FA> eg:
FA> main()
FA> {
FA>  foo();
FA>  }

FA> char* foo()
FA> {
FA>  char *s = malloc(80);
FA>  }

FA> If this function is to return s, freeing it before return would not 
FA> be a good idea, is that true ?

That is correct.

FA> If it is, how would i then get access to s to free it ? It's out of 

How do you get access to s to USE it in the first place?  Surely
you are going something like this:

t = foo();

???

If so, then to free the memory, just go free(t);

FA> scope, as silly as is i've tried free(s) from main, compiler says 
FA> "what s?" of course.
FA> Btw, i have thought about freeing it before returning, and it *seems* to 
FA> work fine in DOS, but i don't know how safe that is. 

This is quite confusing, but I think what you mean is you free it
and you CONTINUE to use it.  That is as unsafe as jumping off the
Sydney Harbour Bridge using a hanky as a parachute.  You end up
getting wet.

FA> I also believe that in a multitask environment, that would be fatal if 
FA> another program got a slice between free() and return, am i thinking 
FA> straight here or not ?                     

Sort of and sort of not.  BFN.  Paul.
@EOT:

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