need help: on using g++ String with LEDA 3.1.2

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2 total messages Started by Ashvin Kannan Tue, 01 Aug 1995 14:46

#12

Author: Ashvin Kannan
Date: Tue, 01 Aug 1995 14:46

41 lines
1429 bytes

Hi all,

  I'm having problems using the g++ "String" class (from 2.6.3) with LEDA
3.1.2. In using LEDA's "dictionary" class I get an error message that
"compare" is not defined, but in looking at g++'s String.h, I can see it. 
It's probably something obvious, I'm missing out on. 

  Please help! Thanks.

  Ashvin

Error messages:
----------------------------------------------------------------------
ERROR compare undefined
IOT trap
----------------------------------------------------------------------

Code:
----------------------------------------------------------------------
#include <String.h>
#include <LEDA/dictionary.h>

int main()
{
    dictionary<String, int> D;
    dic_item it;
    String s;

    while (cin >> s)
    {
	it = D.lookup(s);
	if (it == nil)
	    D.insert(s,1);
	else
	    D.change_inf(it, D.inf(it)+1);
    }	
    forall_items(it,D)
	cout << D.key(it) << ":" << D.inf(i)t << endl;
    return 0;
}
----------------------------------------------------------------------

Re: need help: on using g++ String with LEDA 3.1.2

#13

Author: Heribert Dahms
Date: Tue, 01 Aug 1995 19:10

18 lines
1412 bytes

In <ASHVIN.95Aug1104611@parrot.bu.edu> ashvin@raven.bu.edu writes:

:   I'm having problems using the g++ "String" class (from 2.6.3) with LEDA
: 3.1.2. In using LEDA's "dictionary" class I get an error message that
: "compare" is not defined, but in looking at g++'s String.h, I can see it. 

: #include <String.h>
            ^^^^^^^^ Instead try:
  #include <LEDA/string.h>
: #include <LEDA/dictionary.h>

I've never used g++ strings, but in an earlier life (before switching to
Tcl/Tk 8-) I used LEDA together with InterViews 3.1 and the mixing caused
several problems. If I remember right, I had to use only simple C and LEDA
strings and no InterViews strings.


Bye, Heribert (dahms@ifk20.mach.uni-karlsruhe.de)

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