Is to directly convert the int function or get an integer.

But if the conversion fails, you will get an exception.

trystrtoint

That is, get a Boolean value, judge whether the conversion is successful according to the Boolean value, and then judge whether to fetch data.

defined variable

S: string;

I: integer;

s:= ' 1 1 1 1A '；

If it is not trystroint (s, i), then

begin

ShowMessage ('Conversion failed!' );

end

other

begin

ShowMessage ('converted successfully, the result is'++inttostr(I))；);

End;