The first executable statement of a program should be to print out a version identification. The following is typical:
c****************************************************************
program Clean
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.
.
character version*(*)
parameter(version='Clean: version 1.0 26-jan-90')
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.
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call output(version)
This gives a version and the date when the task CLEAN was last modified.
Additionally, this version identification should be included
in any history generated by the task.