I wrote:
What about +-+000 and ++-+0 though?
And does StrToInt in the current sysutils check this?
An unhandled exception occurred at $0040A462 :
EConvertError : +-000 is an invalid integer
$0040A462
$0040172F
To answer my own question: that one is invalid according to current sysutils
Rather..
var
i: integer;
begin
i:= StrToInt(s);
if (s = '0') or (i 0) then
writeln('S is an integer, and i is now: ', i)
else
writeln('S is not an integer: ', s);
end;
Alternatively:
function IsInteger(s: string; i: integer);
begin
result:=
