Double precision array constructor "requires explicit type"

Question

I try to compile an old Fortran 90 program with gfortran but this doesn't work:

REAL(DP), DIMENSION(10,6) :: csCO2

csCO2(1,:) = (/DOUBLE PRECISION :: 0.0, 0.0, 0.18261340d7, &
0.79224365d2, 0.0, 0.0/)
csCO2(2,:) = (/DOUBLE PRECISION :: 0.0, 0.0, 0.0,&
0.66560660d-4, 0.57152798d-5, 0.3022236d-9/)

this give me the error:

csCO2(1,:) = (/DOUBLE PRECISION :: 0.0, 0.0, 0.18261340d7, &
           ^                                             
cf90-113 f90fe: ERROR FUGCO2, File = CO2EOS.f90, Line = 56, Column = 16 
  IMPLICIT NONE is specified in the local scope, therefore an explicit type 
must be specified for data object "DOUBLE".                      ^                                      
cf90-197 f90fe: ERROR FUGCO2, File = CO2EOS.f90, Line = 56, Column = 23 
  Unexpected syntax: "/)" was expected but found "P".

How can I resolve this?

Why do you use 'DOUBLE PRECISION :: ' in the initialization? — albert
– albert, Commented Sep 20, 2018 at 7:30
Please provide a minimal reproducible example. We cannot help with so little information. — Pierre de Buyl
– Pierre de Buyl, Commented Sep 20, 2018 at 7:33
And that doesn't look much like a gfortran error message. Please show the output of the compiler version information. — francescalus
– francescalus, Commented Sep 20, 2018 at 7:43

francescalus · Accepted Answer · 2018-09-20 07:48:03Z

2

The array constructor syntax

(/ type :: value, ... /)

is not a Fortran 90 feature. It was introduced in Fortran 2003.

The error from the compilation shows that your compiler does not recognize this syntax. You should use a later compiler with support for such array constructors.

You could modify the source code, in this case to,

 csCO2(1,:) = (/0.0_dp, 0.0_dp, 0.18261340e7_dp, 0.79224365e2_dp, 0.0_dp, 0.0_dp/)

etc., but you are much better off using a modern compiler.

answered Sep 20, 2018 at 7:48

francescalus

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2 Comments

Henry Marois Over a year ago

Thank you @francescalus, As I've answered at same time, changing compiler does the trick.

Rodrigo Rodrigues Over a year ago

Still, even if you changed compiler, you should use the snippet provided by @francescalus. In the original code you are mixing a custom parameter kind (dp) with the intrinsic double precision. Stick to just one (the former, preferably)

Henry Marois · Accepted Answer · 2018-09-20 10:06:27Z

0

Changed from gfortran to x86_64-w64-mingw32-gfortran.exe and it work

answered Sep 20, 2018 at 10:06

Henry Marois

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1 Comment

evets Over a year ago

The error message shown above is not from gfortran. Please correct the post to reflect the actual compiler you used.

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