Numeric leak

From: bv (bvoh_at_Xsdynamix.com)
Date: 08/26/04 

Date: Thu, 26 Aug 2004 20:47:14 GMT

I was chasing down dangling digits while using "foreign" code. When all
else failed to explain the phenomenon I took a wild guess and extracted,
what turned to be, the offending culprit - so, *check* your compiler!

      program leak
      real*8 t,dt,h
      data h/.05d0/, ns/50/

      dt = h/ns
      t = 0
      do i=1,ns
        t = t + dt
      enddo
      print*,t
      print*,sngl(t),dt
      end

compiler: xyz - yours?
  5.000000000000004E-002
  5.0000001E-02 1.000000000000000E-003

compiler: wcm
  0.050000000000000
  0.0500000 0.001000000000000

btw, the real beaut is the *sngl* deus ex machina - a true olympic feat!

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