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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Null-object/ALGOL-W/null-object.alg Normal file
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begin
% declare a record type - will be accessed via references %
record R( integer f1, f2, f3 );
% declare a reference to a R instance %
reference(R) refR;
% assign null to the reference %
refR := null;
% test for a null reference - will write "refR is null" %
if refR = null then write( "refR is null" ) else write( "not null" );
end.