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The & Operator
Arguments in Fortran are always passed by reference
(Just like in Perl)
That means that the Fortran call FOO(X) passes the address of X
Of course, the receiving side doesn't see the address
Instead, the formal parameter is temporarily aliased to X
Just like in Perl:
foo($x);
sub foo {
# $_[0] is temporarily aliased to $x
}
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Copyright © 2001 M. J. Dominus |