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problems with ifort 2024.0 module

phost75
Beginner
‎02-06-2024 08:28 PM
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I found  a bug very annoying

that is when I use a module

such as :

module modAll
 real(8) :: xmin=20624644.1898306, ymin=3287818.10173523

end module modAll

 

however when in program main to use modAll,

the xmin and ymin become integer, 

that is xmin = 20624644.0 ymin = 3287818.0

how to solve this bug?

 

 

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TobiasK
Moderator
‎02-07-2024 12:12 AM
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@phost75 this is not an error but according to the standard.
Since you do not specify a 'kind' value, 20624644.1898306 is single precision. 20624644.1898306 cannot represented in single precision so it gets truncated.

20624644.1898306_8 is what you need. (I would recommend to move away from (8) and use real64 or any other user defined kind parameter.)

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