What does the following code do? var a, b : integer; begin a:=a+b; b:=a-b;…

GATE · 1993 · CS · Question 7 subparts

What does the following code do?

var a, b : integer;

begin

a:=a+b;

b:=a-b;

a:=a-b

end;

A.
exchanges a and b
B.
doubles a and stores in b
C.
doubles b and stores in a
D.
leaves a and b unchanged
E.
none of the above

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