kenobi
12/29/2015 5:57:00 PM
W dniu poniedzialek, 28 grudnia 2015 02:30:57 UTC+1 uzytkownik Ramine napisal:
> Hello,
>
>
> Look at this example in FreePascal and Delphi:
>
> ===
> program test;
>
> var a:integer;
>
>
> procedure test(b:Longword);
> begin
> writeln(b)
> end;
>
> begin
>
> a:=-3;
>
> try
> test(a);
>
> except
> writeln('problem!');
> end;
> end.
>
> ==
>
>
> If you compile this example in FreePascal with the -Cr option for
> range checking, the example above will generate an exception because
> at runtime you are trying to pass a negative number to the function
> that receive a Longword, that means that receive in C an unsigned long,
> so this technic will scale to a much more complex software that
> is wrote for realtime safety critical systems.. but in C++ and C you
> can not do that, but you can just test for the range of the variables,
> but if the software is more complex and you forgot to test the range of
> some variables and it causes a catastrophe at runtime, that`s not ok!
> but with the technic above in FreePascal, you can catch the exception
> easily and you can try to avoid a catastrophe on the realtime safety
> critical system.
>
>
> This is why C and C++ are bad.
>
>
>
>
this proog is worth a Ram (you know male of the sheep not much famous of intelligence)
check it up ram