Setting a String to NULL in C++?

[perseus]

I have a string, say GLOBAL, that I use a lot
in a CPP-program. From time to time this string needs to
be set to the NULL-string, i.e., empty itself of its content.
How do we do it?
Thanks!

Perseus

[Victor Bazarov]

Re: Setting a String to NULL in C++?

"perseus" <fanta@fantigo. com> wrote...[color=blue]
> I have a string, say GLOBAL, that I use a lot
> in a CPP-program. From time to time this string needs to
> be set to the NULL-string, i.e., empty itself of its content.
> How do we do it?[/color]

To empty a string call the 'clear' member function. There
is no 'setting to NULL' because it's not a pointer.

Victor

[perseus]

Re: Setting a String to NULL in C++?


On Mon, 21 Jul 2003 02:14:50 GMT, "Victor Bazarov"
<v.Abazarov@att Abi.com> wrote:
[color=blue]
>"perseus" <fanta@fantigo. com> wrote...[color=green]
>> I have a string, say GLOBAL, that I use a lot
>> in a CPP-program. From time to time this string needs to
>> be set to the NULL-string, i.e., empty itself of its content.
>> How do we do it?[/color]
>
>To empty a string call the 'clear' member function. There
>is no 'setting to NULL' because it's not a pointer.
>
>Victor
>[/color]

Victor,

Can I call this function in BC5 with Windows XP?
What .h file is needed here?
An example would be just great!
Thanks!

perseus

[Chris Johnson]

Re: Setting a String to NULL in C++?

perseus <fanta@fantigo. com> writes:
[color=blue]
> Can I call this function in BC5 with Windows XP?[/color]

Any C++ compliant compiler can do this regardless
of platform.
[color=blue]
> What .h file is needed here?[/color]

#include <string>
[color=blue]
> An example would be just great![/color]

string foo("Bar need's a good C++ book");

// examines include dir's more often

foo.clear();

Respectfully,
Chris Johnson


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[Ales DOLECEK]

Re: Setting a String to NULL in C++?

On Mon, 21 Jul 2003 07:00:58 +0100
"John Harrison" <john_andronicu s@hotmail.com> wrote:
[color=blue]
>
> "perseus" <fanta@fantigo. com> wrote in message
> news:oanmhvgten 2ikskf9in0rpvk4 0f02faujo@4ax.c om...[color=green]
> > Chris,
> >
> > It will not work on BC5.
> >
> > ERROR: 'clear' is not a member of
> > std::basic_stri ng<char,std::st ring_char_trait s<char>...
> >
> > Thanks!
> >
> > perseus
> >[/color]
>
> It should, but since your compiler is obviously broken, how about the
> obvious
>
> foo = "";
>
> john[/color]

It has nothing to do with compiler. It is unimlemented in STL you are
using.

BTW: I use STL from SGI on linux and have same "problem" which I solve
in same way as John. :-)

Ales