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input/output trouble cause segmentation fault

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  input/output trouble cause segmentation fault eric <cneric12lin0@gmail.com> - 2011-07-12 22:27 -0700
    Re: input/output trouble cause segmentation fault Ian Collins <ian-news@hotmail.com> - 2011-07-13 18:02 +1200
      Re: input/output trouble cause segmentation fault eric <cneric12lin0@gmail.com> - 2011-07-12 23:23 -0700
        Re: input/output trouble cause segmentation fault eric <cneric12lin0@gmail.com> - 2011-07-13 00:56 -0700

#7769 — input/output trouble cause segmentation fault

Dear advanced c/g++ programers:

  A program request me to enter twice input
that program probably is tested good on visual c++ 7.1 on window xp,
but my system is g++ on linux(Ubuntu10.04)
It assume
Enter some strings: a b c d
^Z
Enter some more strings: d e f g
^Z
Union: a b c d e f g
Difference: a b c
Intersection: d
all these you can get from page 273 and 274 of book(c++ cookbook)

but my test result is
-------------------------------
eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
Enter a series of strings: a b c d
^Z
[7]+  Stopped                 ./a.out
eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
Enter a series of strings: a b c d
{a, b, c, d}
Segmentation fault
-------------------------------------------------------------------
second case , I used <Enter><Control-D>
first case, I used <Enter><Control-Z>

the following in the program I tested, you still can download from
http://examples.oreilly.com/9780596007614/
------------------------------------------------------------------------------------------------
// Example 7-8.  Unsing set operations
#include <iostream>
#include <algorithm>
#include <string>
#include <set>
#include <iterator>
#include "utils.h"      // For parintContainer(): see 7.10

using namespace std;

int main() {

  cout << "Enter some strings: "
  istream_iterator<string> start(cin);
  istream_iterator<string> end;
  set<string> s1(start, end);

  cin.clear();

  cout << "Enter some more strings: ";
  set<string> s2(++start, end);

  set<string> setUnion;
  set<string> setInter;
  set<string> setDiff;

  set_union(s1.begin(), s1.end(),
            s2,begin(), s2.end(),
            inserter(setUnion, setUnion.begin()));

  set_difference(s1.begin(), s1.end(),
                 s2.begin(), s2.end(),
                 inserter(setDiff, setDiff.begin()));

  cout << "Union:\n";
  printContainer(setUnion);
  cout << "Difference:\n";
  printContainer(setDiff);
  cout << "Intersection:\n";
  printContainer(setinter);
}
--------------------------------------------------------------------------------------------------
utils.h
-------------------------------
// Example 7-12. Writing your own printing function
#include <iostream>
#include <string>
#include <algorithm>
#include <iterator>
#include <vector>

using namespace std;

template<typename C>
void printContainer(const C& c, char delim = ',', ostream& out = cout)
{
   printRange(c.begin(), c.end(), delim, out);
}

template<typename Fwd>
void printRange(Fwd first, Fwd last, char delim = ',', ostream& out =
cout) {
   out << "{";
   while (first != last) {
     out << *first;
     if (++first != last)
        out << delim << ' ';
   }
   out << "}" << endl;
}
------------------------------------------------------------------------------------------------------------------
Ned and thanks your help a lot in advance
Eric

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#7770

On 07/13/11 05:27 PM, eric wrote:
> Dear advanced c/g++ programers:
>
>    A program request me to enter twice input
> that program probably is tested good on visual c++ 7.1 on window xp,
> but my system is g++ on linux(Ubuntu10.04)
> It assume
> Enter some strings: a b c d
> ^Z
> Enter some more strings: d e f g
> ^Z
> Union: a b c d e f g
> Difference: a b c
> Intersection: d
> all these you can get from page 273 and 274 of book(c++ cookbook)
>
> but my test result is
> -------------------------------
> eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> Enter a series of strings: a b c d
> ^Z
> [7]+  Stopped                 ./a.out
> eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> Enter a series of strings: a b c d
> {a, b, c, d}
> Segmentation fault

What does your debugger tell you?

-- 
Ian Collins

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#7771

On Jul 12, 11:02 pm, Ian Collins <ian-n...@hotmail.com> wrote:
> On 07/13/11 05:27 PM, eric wrote:
>
>
>
> > Dear advanced c/g++ programers:
>
> >    A program request me to enter twice input
> > that program probably is tested good on visual c++ 7.1 on window xp,
> > but my system is g++ on linux(Ubuntu10.04)
> > It assume
> > Enter some strings: a b c d
> > ^Z
> > Enter some more strings: d e f g
> > ^Z
> > Union: a b c d e f g
> > Difference: a b c
> > Intersection: d
> > all these you can get from page 273 and 274 of book(c++ cookbook)
>
> > but my test result is
> > -------------------------------
> > eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> > Enter a series of strings: a b c d
> > ^Z
> > [7]+  Stopped                 ./a.out
> > eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> > Enter a series of strings: a b c d
> > {a, b, c, d}
> > Segmentation fault
>
> What does your debugger tell you?
>
> --
> Ian Collins

Thanks your reply
I modify some
it have output, but its output not exactly match book predict,
especially, when I input
a b c d
then
d e f g
Union: is match
difference is match
but
Intersection is not
My result is {}, but book expect d
and I think book is correct
so plz help again, thanks a lot in advance
Eric

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#7772

On Jul 12, 11:23 pm, eric <cneric12l...@gmail.com> wrote:
> On Jul 12, 11:02 pm, Ian Collins <ian-n...@hotmail.com> wrote:
>
>
>
> > On 07/13/11 05:27 PM, eric wrote:
>
> > > Dear advanced c/g++ programers:
>
> > >    A program request me to enter twice input
> > > that program probably is tested good on visual c++ 7.1 on window xp,
> > > but my system is g++ on linux(Ubuntu10.04)
> > > It assume
> > > Enter some strings: a b c d
> > > ^Z
> > > Enter some more strings: d e f g
> > > ^Z
> > > Union: a b c d e f g
> > > Difference: a b c
> > > Intersection: d
> > > all these you can get from page 273 and 274 of book(c++ cookbook)
>
> > > but my test result is
> > > -------------------------------
> > > eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> > > Enter a series of strings: a b c d
> > > ^Z
> > > [7]+  Stopped                 ./a.out
> > > eric@eric-laptop:~/cppcookbook/ch7$ ./a.out
> > > Enter a series of strings: a b c d
> > > {a, b, c, d}
> > > Segmentation fault
>
> > What does your debugger tell you?
>
> > --
> > Ian Collins
>
> Thanks your reply
> I modify some
> it have output, but its output not exactly match book predict,
> especially, when I input
> a b c d
> then
> d e f g
> Union: is match
> difference is match
> but
> Intersection is not
> My result is {}, but book expect d
> and I think book is correct
> so plz help again, thanks a lot in advance
> Eric

never mind
I miss a section

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