Rene Brun
//-------------------------------------------------------------------
#include "TROOT.h"
#include "TH1.h"
//#include "TCanvas.h"
TROOT rootBase("toto","test root");
int main(int argc,char **argv)
{
TH1F *h1;
h1 = new TH1F("h1","Histogram 1",100,0.,100.);
h1->Dump();
} // end of main
Pascal Perrodo wrote:
>
> Hi,
>
> I try to run ROOT on the ATLAS cluster (hp version 10).
> I use:
> ROOTSYS = /afs/cern.ch/na49/library.4/ROOT/v2.13/hp700_ux102/root/
> LD_LIBRARY_PATH =
> /afs/cern.ch/na49/library.4/ROOT/v2.13/hp700_ux102/root/lib
> As an interactive process( $ROOTSYS/bin/root ), ROOT works fine.
>
> I now try to write a simple c++ code which calls ROOT and tries to create
> an histo and dump it. This histo is badly created (xmin=xmax). I don't
> understand why.
> Please find below the makefile and the simple code a.cxx
> Many thanks in advance for your help.
>
> Pascal Perrodo.
>
> -------------------------------------------------------
> #
> # Makefile for compile of c++ code with call to ROOT libs
> #
>
> C++FLAGS = -g -I$(ROOTSYS)/include
> LDFLAGS = -g
>
> CC = cc
> CXX = CC
> LINKER = $(CXX)
>
> ROOTLIBS = -L$(ROOTSYS)/lib -lNew -lBase -lCint -lClib -lCont -lFunc\
> -lGraf -lGraf3d -lHist -lHtml -lMatrix -lMeta -lMinuit -lNet \
> -lPostscript -lProof -lTree -lUnix -lZip
> ROOTGLIBS = -lGpad -lGui -lGX11 -lX3d
>
> LIBS = $(ROOTLIBS) -lm
> GLIBS = $(ROOTLIBS) $(ROOTGLIBS) -L/usr/lib/X11R5 \
> -lXpm -lX11 -lm -ldld
>
> CCNAME = a
>
> OBJ = $(CCNAME).o
> SRC = $(CCNAME).cxx
>
> all: $(CCNAME)
>
> $(CCNAME): $(OBJ) $(SRC)
> $(LINKER) $(LDFLAGS) -o $(CCNAME) $(OBJ) $(GLIBS)
>
> $(CCNAME).o: $(SRC)
> $(CXX) -c $(CCNAME).cxx $(C++FLAGS)
>
> -----------------------------------------------------------------------
> //-------------------------------------------------------------------
> //
> // Example of ROOT libraries called in a C++ code
> //
> // Pascal Perrodo 25/02/1997
> //-------------------------------------------------------------------
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <iostream.h>
> #include <math.h>
>
> #include "TROOT.h"
> #include "TH1.h"
>
> #include "TCanvas.h"
>
> // needed by Motif
> extern void InitGui();
> VoidFuncPtr_t initfuncs[] = { InitGui, 0 };
> TROOT rootBase("toto","test root",initfuncs);
>
> int main(int argc,char **argv)
> {
>
> TH1F *h1;
>
> h1 = new TH1F("h1","Histogram 1",100,0.,100.);
> h1->Dump();
>
> } // end of main
> ----------------------------------------------------------------------