Procedure Foo ( Var x );like in Borland Pascal. In GNU Pascal, you can also use
Procedure Foo ( Var x: Void );
Procedure Foo ( a: Integer; ... );but does not (yet) provide a portable mechanism to access the additional arguments.
Procedure Foo ( a: array of Integer );are implemented. However, Standard Pascal conformant array parameters (only partially implemented) are a "cleaner" mechanism to pass arrays of variable size.
Procedure DrawGraph ( f: Function ( Real ): Real );
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