[ROOT] How can I choose the accuracy of numbers ?

From: Luis March Ruiz (march@ific.uv.es)
Date: Wed May 26 2004 - 19:06:43 MEST 

  Dear ROOT users,

  I copy some results to a txt file (it goes OK),

  fprintf(foutput," %s    %g     %g      %g       %g      %g \n",
histo,p0[i],e0[i],Chi2_offset,Chi_2/(n_bin*1.0-1.0),Kolmog_comp[i]);

  All these numbers are declared as Double_t.

  my problem is: 

  How can I choose the accuracy of numbers ? 

  I would like to put them in columns with the same width (i.e. with the 
same number of digits for all numbers).

  I have been looking for SetPrecision or something like that, but I 
didn't find nothing (only TGNumberFormat, but there isn't any example).

  I apologize for any inconvenience.

  Thanks.

  Best regards,

                                                    Luis

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