8 lines
221 B
Text
8 lines
221 B
Text
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procedure realistic_insert_link( a, c: link_ptr );
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begin
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if a^.next <> nil then a^.next^.prev := c; (* 'a^.next^' is another way of saying 'b', if b exists *)
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c^.next := a^.next;
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a^.next := c;
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c^.prev := a;
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end;
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