Fortran 90/95 and Computational Physics

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Numeric Kind ParameterisationProgram test_kindImplicit noneReal :: a! selected_real_kind([p][,r]) p = precision, r = rangeInteger, parameter :: long = selected_real_kind(9,99)Real(long) :: ba = 1.7; b = 1.7_longPrint *, a,kind(a), precision(a), range(a)Print *, b,kind(b), precision(b), range(b)b = 1.7;b = 1.7D0;print *, bprint *,bEnd Program test_kindFortran 90/95 and Computational Physics – p.11/22
IMPLICIT NONEStrong typing: all typed entities must have their typesspecified explicitlyBy default an entity in Fortran that has not been assigned atype is implicitly typed, e.g. entities that begin with i,j, ... areof type integer → dangerous source of errors(Legend has it that error of this type caused the crash of the American Space Shuttle)The statement IMPLICIT NONE turns on strong typing andits use is strongly recommendedFortran 90/95 and Computational Physics – p.12/22
Page 1 and 2: Fortran 90/95 and ComputationalPhys
Page 3 and 4: What is Fortran 90?Fortran 90/95 an
Page 5 and 6: The OriginA team lead by John Backu
Page 7 and 8: Why Fortran 90?Fortran 90/95 and Co
Page 9 and 10: Numerical LibrariesFortran has been
Page 11 and 12: The ConstructsF90 has many familiar
Page 13 and 14: The ConstructsF90 has many familiar
Page 15: The ConstructsF90 has many familiar
Page 19 and 20: Modules - Another ExampleMODULE cir
Page 21 and 22: Array FeaturesPROGRAM arrayUSE cons
Page 23 and 24: External Subroutines - cont.PROGRAM
Page 25 and 26: External Subroutines - cont.Externa
Page 27 and 28: External Subroutines - cont.Externa
Page 29 and 30: SummaryFortran has from the beginni

Fortran 90/95 and Computational Physics

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