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    <p>Although the suggestions were in place, there were also several things that were forgotten. Range of the REAL kind, and some formatting problems.</p> <p>Anyways, here's one patched up solution, compiled and working, so try to see if this will work for you. I've took the liberty of choosing my own method for fibonacci numbers calculation.</p> <pre><code> program SO1658805 implicit none integer, parameter :: iwp = selected_real_kind(15,310) real(iwp) :: fi, fib integer :: i character(60) :: line character(1) :: digit integer :: n0=0, n1=0, n2=0, n3=0, n4=0, n5=0, n6=0, n7=0, n8=0, n9=0 open(unit=1, file='temp.txt', status='replace') rewind(1) !-------- calculating fibonacci numbers ------- fi = (1+5**0.5)/2. do i=0,1477 fib = (fi**i - (1-fi)**i)/5**0.5 write(1,*)fib,i end do !---------------------------------------------- rewind(1) do i=0,1477 read(1,'(a)')line line = adjustl(line) write(*,'(a)')line read(line,'(a1)')digit if(digit.eq.' ') n0=n0+1 if(digit.eq.'1') n1=n1+1 if(digit.eq.'2') n2=n2+1 if(digit.eq.'3') n3=n3+1 if(digit.eq.'4') n4=n4+1 if(digit.eq.'5') n5=n5+1 if(digit.eq.'6') n6=n6+1 if(digit.eq.'7') n7=n7+1 if(digit.eq.'8') n8=n8+1 if(digit.eq.'9') n9=n9+1 end do close(1) write(*,'("Total number of different digits")') write(*,'("Number of digits 0: ",i5)')n0 write(*,'("Number of digits 1: ",i5)')n1 write(*,'("Number of digits 2: ",i5)')n2 write(*,'("Number of digits 3: ",i5)')n3 write(*,'("Number of digits 4: ",i5)')n4 write(*,'("Number of digits 5: ",i5)')n5 write(*,'("Number of digits 6: ",i5)')n6 write(*,'("Number of digits 7: ",i5)')n7 write(*,'("Number of digits 8: ",i5)')n8 write(*,'("Number of digits 9: ",i5)')n9 read(*,*) end program SO1658805 </code></pre> <p>Aw, ... I just read you need the number of digits stored in to an array. While I just counted them.</p> <p>Oh well, ... "left as an exercise for the reader ..." :-)</p>
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    1. COThanks for the reply. Interestingly enough, I ended up doing a similar approach (except that I converted the number to a string and parsed it to get the first value). For the last fibonacci value I got +infinity, so does selected_real_kind(15,310) have a larger range than real*8?
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    2. COOk, just tried your iwp trick and it actually gives me the last value now, thanks! :)
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    3. COThat depends on the compiler/processor ... in any case, if one desires portable precision, one should go with explicitly defining his demands in a custom kind type (the selected_real_kind ...). I do not know what is the range of real*8, since it most probably isn't the same on your and mine system. Anyways, I hope you solved your problem.
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