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fortran funtions with parameters

cvnravi
Beginner
‎08-26-2009 03:52 AM
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Hi,


How can i write a funtion in fortran which takes both input and output as arguments.

ex: fun(integer input,integer output)

I want to make use of output value. Currently I am doint the same but the output variable is not holding the value.


I am calling a C funtion from fortran which take input and output as parameters I am able to pass input values succussfully but output is not holding its value.
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TimP
Honored Contributor III
‎08-26-2009 05:58 AM
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As you would expect, plain VALUE attribute works only with INTENT(IN). Without VALUE, the correspondence on the C++ side is by reference or C pointer. c_ptr also could be used to pass data from C to Fortran. In case I have totally mis-guessed your intentions, and textbook examples don't fit your usage, your own example could be useful.
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