Lab2

program swap;
var a,b,c:integer;
begin
  a:=8;
  b:=13;
  a:=a+b;
  b:=a-b;
  a:=a-b;

writeln ('a=', a);
writeln ('b=', b);
end.

program swap;
var a, b, c: integer;
begin
    a := 8;
    b := 13;
    a := a + b;
    b := a - b;
    a := a - b;

    writeln('a=', a);
    writeln('b=', b);
end.