Once again ifstreams (Version 1.03/09)

From: martin braeuer (Martin.Braeuer@mpi-hd.mpg.de)
Date: Mon Feb 02 1998 - 22:44:18 MET


Hallo Rooters,
with the Version 1.03 /09 I have some nasty (newbee?) problems :

1. the macro :

// ------------------------------------
int prod()
{ 
 ifstream datfile("test2.ve");
 return 0;  
} 
//-------------------------------------

produces :

Fatal in <operator delete>: storage area overwritten
aborting
IOT/Abort trap (core dumped)

on Alpha and other systems (Irix and Linux) give nearly the same result.

using a new construct works until one tries to read the file :

//--------- Prod.C --------------
int prod()
{  
  ifstream* df = new ifstream("ein.ve");
  Float_t x;
   
  df >> x;
  return 0;  
} 
//-------------------------------------

used in the root :

root [10] .! more ein.ve 
1 2.3  4.5
1 2.31 4.5
1 2.32 4.5
1 2.34 3.5
1 2.35 4.45
1 2.32 4.5
1 2.34 3.5
1 2.35 4.45
root [11] .x prod.C()   
!!! 0 object(s) deleted by Garbage Collection !!!
Error: R Illegal operator for real number
FILE:/d25/herab/users/braeuer/laser98/./prod.C LINE:6
(class ifstream*)0x1406b5a00
*** Interpreter error recovered ***
root [12] 
//--------------------------------------------

On the other hand the ">>"works while using the first version shown above,
which sends root to hell when leaving the function.

What do I miss ?
Thaks for your help,
Greetings Martin


        /----------------------------------------------------------------\
        |  Martin Braeuer                                                |
        |   DESY -F15- (bldg. 66 r. 11) MPI fuer Kernphysik              |
        |   Notkestrasse 85             Saupfercheckweg 1, Postf. 103980 |
        |   22603 Hamburg               69029 Heidelberg                 |
        |   braeuer@desy.de             braeuer@eu1.mpi-hd.mpg.de        |
        |   tel.: +49 40 8998 4680      tel.: +49 6221 516 506           |
        |                     +49 171 4580494                            |
        \----------------------------------------------------------------/



This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:34:29 MET