Program to find the 1st nth terms and their sum of fibonacci series

C      Program to find the 1st nth terms and their sum of fibonacci series
        write(*,*)'Enter the number of terms you want to see'
        read(*,*)n
        i=1
        j=1
        sum=0
      write(*,*)'The 1st',n,'terms are:'
        do l=1,n
        write(*,*)i
        sum=sum+i
        k=i+j
        i=j
        j=k
        end do
        write(*,*)'The sum of the series is:',sum
        end

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How to Install CERN ROOT on Ubuntu: A Step-by-Step Guide

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Use of TClonesArray Class

void write { TClonesArray * arr = new TClonesArray ( " TVector3 " ); TClonesArray & ar = * arr ; TFile * file = new TFile ( " file.root " , " recreate " ); TTree * tree = new TTree ( " tcl " , " tcl " ); tree -> Branch ( " array " , & arr ); TRandom2 * rand = new TRandom2 ( 1 ); for ( int i = 0 ; i < 100 ; i ++) { arr -> Clear (); for ( int j = 0 ; j < 1000 ; j ++) { double x = rand -> Rndm (); double y = rand -> Rndm (); double z = rand -> Rndm (); new ( ar [ j ]) TVector3 ( x , y , z ); } tree -> Fill (); } file -> Write (); file -> Close (); } void read () { TFile * file = new TFile ( " file.root " ); TTree * tree = ( TTree *) file -> Get ( " tcl " ); TClonesArray * arr = new ...

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