If you change lines 20 and 21 to:

           sum += (*p).second;
           cout << (*p).first << '\t' << (*p).second << endl;             //

it works fine with BC++ 5.02 or Borland C++ Builder 3.

The RogueWave implementation probably does not have a -> operator for STL
iterators.

Markus Pesti wrote:

> Bjarne Stroustrup's map-example produces a compiler error while
> accessing the iterators (lines 20 and 21):
>
> //--------------------------------------------------------------------------
> -
> 01 #include <string>
> 02 #include <map>
> 03 #include <iostream>
> 04 using namespace std;
>
> 05 void readitems (map<string, int, less<string> >& m)
> 06 {
> 07  string word;
> 08      int value = 0;
> 09      while (cin >> word >> value)
> 10       m[word] += value;
> 11 }
>
> 12 int main(int argc, char **argv)
> 13 {
> 14      map<string, int, less<string> > tbl;
> 15      readitems(tbl);
>
> 16      int sum = 0;
> 17      typedef map<string, int, less<string> >::const_iterator CI;
>
> 18      for(CI p = tbl.begin(); p != tbl.end(); ++p)
> 19      {
> 20           sum += p->second;
> // <-------------------------------------------------------------
> 21           cout << p->first << '\t' << p->second << endl;             //
> <-------------------------------------------------------------
> 22      }
>
> 23      cout << "sum:\t" << sum << endl;
>
> 24  return !cin;
> 25 }
> //--------------------------------------------------------------------------
> -
>
> With the MS CV++ 5 compiler the example works properly.
> Is there anybody who knows what's wrong there?
>
> Thanks Markus
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Bjarne Stroustrup's map-example produces a compiler error while
accessing the iterators (lines 20 and 21):

//--------------------------------------------------------------------------
-
01 #include <string>
02 #include <map>
03 #include <iostream>
04 using namespace std;

05 void readitems (map<string, int, less<string> >& m)
06 {
07  string word;
08      int value = 0;
09      while (cin >> word >> value)
10       m[word] += value;
11 }

12 int main(int argc, char **argv)
13 {
14      map<string, int, less<string> > tbl;
15      readitems(tbl);

16      int sum = 0;
17      typedef map<string, int, less<string> >::const_iterator CI;

18      for(CI p = tbl.begin(); p != tbl.end(); ++p)
19      {
20           sum += p->second;
// <-------------------------------------------------------------
21           cout << p->first << '\t' << p->second << endl;             //
<-------------------------------------------------------------
22      }

23      cout << "sum:\t" << sum << endl;

24  return !cin;
25 }
//--------------------------------------------------------------------------
-

With the MS CV++ 5 compiler the example works properly.
Is there anybody who knows what's wrong there?

Thanks Markus
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