In
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The reserved word in
:
- It tests whether a value is in a set. It returns the boolean value
true
if the value belongs to the set andfalse
if the value does not belong to the set. - It is also used with the reserved word
for
in for-in loop. - It is also usable in
uses
‑clauses.
example
program projectin;
uses SysUtils,TypInfo;
type
Berry = (Blueberry,FlyHoneysuckle, Lingonberry, Raspberry,Snowberry,Strawberry);
Berries = set of berry;
var
basket: Berries;
someberry:berry;
str:string;
i:integer;
begin
basket := [];
writeLn('Choose a berry from the following berries into your basket');
repeat
i:=1;
for someberry in berry do
begin
Str := GetEnumName(TypeInfo(Berry),ord(someberry));
writeln(i,' : ',Str);
inc(i);
end;
writeln('0 : exit ');
writeln;
readln (i);
if i>0 then
begin
someberry :=Berry(i-1);
Include(basket,someberry);
end;
until i=0;
if (FlyHoneysuckle in basket) or (Snowberry in basket) then
begin
writeln ('You have poisonous berries in your basket');
if FlyHoneysuckle in basket then
writeln ('Your basket has a poisonous Fly honeysuckle!') ;
if Snowberry in basket then
writeln ('Your basket has a poisonous Snowberry!');
end;
writeln('So you had these berries in your basket:');
for someberry in basket do
begin
Str := GetEnumName(TypeInfo(Berry),ord(someberry));
writeln(Str);
end;
readln ;
end.