Subj : Re: stack question...?
To   : borland.public.cpp.borlandcpp
From : John F\(dot\)
Date : Thu Sep 15 2005 08:45 pm

more elegant (not efficient, since AFAIK it is most efficient using global 
variables) it would be utilizing structures

typedef struct Stack_s
{
    int* stk;
    int  n;
    int  pc;
}Stack_t;

and static Stack_t inside a handling-function,
maybe with sth like

int StackHandling(enum Action, int Parameter)
{
        static Stack_t MyStack;
        static int Init_Flag, Returnvalue;

    switch(Action)
        {
            case INIT: //parameter used as count
                        //Initcode
                        break;
            case PUSH: //parameter used as
            .....
        }
    return Returnvalue;
}

and

push(int y)
{
    StackParam_t P;
    P.Value=y;
    StackHandling(PUSH, P);
}
....

alternatively you define your Stack outside the library, then you ge sth 
like

push(Stack_t* MyStack, int ToPush)
....

freestk()
{
  free(stk);
}

should be:

freestk()
{
  free(stk);
  stk=NULL;
}

and check failure of malloc!!!!

regards John

.