Re: funny recursion issue

From:

Milan Krejci <rdw@no-spam.mail.cz>

Newsgroups:

comp.lang.c++

Date:

Mon, 20 Aug 2007 11:09:01 +0200

Message-ID:

<fablnd$2geh$1@news.vol.cz>

well, ok, but how do you explain that

    std::vector <SD>::iterator is;
    for (is=vec_svatku->begin();is!=vec_svatku->end();is++) {
    from=(*is).vrat_from(); to=(*is).vrat_to();
    if (from==15 && to==31) doba_svatek=true;
    }
    if (doba_svatek) { ts<<"svatek X\n"; t->append("svatek"); }
ts=writes into a file
t=writes a text to a text window.

in the window i can see "svatek" but in the file there is svatek X three
or whatever times.

Neelesh Bodas napsal(a):

On Aug 20, 12:31 pm, Milan Krejci <r...@no-spam.mail.cz> wrote:

hi, this is something i really don't see where the problem might be.

         std::vector <LCDRange *>::iterator it;
        LCDRange *l;
for (it=vec->begin();it!=vec->end();it++) { //is executed N times
         l=*(it);
...
        l->p_doba->vycet_doby(t);

}

first i add "15,31,Dovolena" to l->p_doba->SDoby. next loop i add
"15,31,Nemoc", 3rd time i add "15,31,Svatek".

vycet_doby function goes like this:
    std::map<SD,std::string>::iterator itd;
         int a,b; SD s;
        vec_prace=new vecSD;
        vec_weekendu=new vecSD;
        vec_svatku=new vecSD;
        vec_nemoci=new vecSD;
        vec_dovolene=new vecSD;
    for (itd = SDoby.begin(); itd != SDoby.end(); itd++)
     { s=itd->first;
         a=s.vrat_from();
        b=s.vrat_to();
        std::cout << a << "-" << b << ":" << itd->second << std::endl;
...}
this, however, outputs:
15-31:Dovolena
15-31:Nemoc
15-31:Svatek
15-31:Dovolena
15-31:Nemoc
15-31:Svatek
15-31:Dovolena
15-31:Nemoc
15-31:Svatek

N times (3 times in this case). i thought it should output only once for
each l->p_doba->SDoby. do you get my point?

Can't get much out of this code, but my guess is that it is because
you are using a for loop inside vycet_doby function which is itself in
a for loop.
-N