Re: Here is why C++ and C are bad...

From	Richard Heathfield <rjh@cpax.org.uk>
Newsgroups	comp.programming
Subject	Re: Here is why C++ and C are bad...
Date	2015-12-29 20:31 +0000
Organization	A noiseless patient Spider
Message-ID	<n5uqdd$gin$1@dont-email.me> (permalink)
References	<n5kdn4$cji$1@dont-email.me>

Show all headers | View raw

On 26/12/15 00:54, Ramine wrote:
>
> Hello,
>
> I was working on a project in C++, but i have encountered
> a problem with the language that we call C++, this problem
> is inherent to C++ and C, here is a small example that
> shows the problem:
>
> ===
>
> #include <iostream>
> using namespace std;

This is a very bad idea. The *whole point* of namespaces is to avoid 
name clashes. What you should do (and indeed what you *do* do) is to use 
the std:: prefix for symbols that you pull in from the std namespace. So 
you don't need using namespace std at all! Just remove it.

>
> int main()
> {
>   unsigned int u = 1234;
> int i = -1233;

What does u represent? Why is it unsigned?

What does i represent? Why is it signed?

>
> unsigned int result1 = u + i;

Why are you adding a signed quantity to an unsigned quantity?

>    std::cout << "Number is = " << result1 <<   std::endl;
>
> }
>
> ==
>
>
> In this example, C++ and C will convert i from a signed int type to
> unsigned int type but this is not good ,

It's bad code. C and C++ let you write bad code because, if they didn't, 
a heck of a lot of useful programs would never get written. (There are 
only so many good programmers to go round.) So the onus is on you to 
write good code.

> because this types of
> conversion can cause bugs and errors of logic ,

Then don't do it!

Your article says a lot more about your programming style than it does 
about either C or C++.

-- 
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
Sig line 4 vacant - apply within

Back to comp.programming | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-29 20:31 +0000
  Re: Here is why C++ and C are bad... Kaz Kylheku <kaz@kylheku.com> - 2015-12-29 21:20 +0000
  Re: Here is why C++ and C are bad... David Brown <david.brown@hesbynett.no> - 2015-12-29 23:13 +0100
    Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-29 22:19 +0000
      Re: Here is why C++ and C are bad... David Brown <david.brown@hesbynett.no> - 2015-12-30 09:56 +0100
        Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-30 13:28 +0000
          Re: Here is why C++ and C are bad... David Brown <david.brown@hesbynett.no> - 2015-12-30 14:55 +0100
            Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 16:32 +0000
              Re: Here is why C++ and C are bad... David Brown <david.brown@hesbynett.no> - 2015-12-30 18:17 +0100
                Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 20:01 +0000
          Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 15:48 +0000
            Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-30 16:35 +0000
              Re: Here is why C++ and C are bad... David Brown <david.brown@hesbynett.no> - 2015-12-30 18:19 +0100
                Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-30 17:39 +0000
                Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 20:26 +0000
              Re: Here is why C++ and C are bad... "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2015-12-30 18:32 +0100
              Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 19:55 +0000
                Re: Here is why C++ and C are bad... Richard Heathfield <rjh@cpax.org.uk> - 2015-12-30 20:15 +0000
                Re: Here is why C++ and C are bad... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-12-30 22:00 +0000
      Re: Here is why C++ and C are bad... Ian Collins <ian-news@hotmail.com> - 2015-12-31 10:16 +1300

csiph-web