Basic Managed C++ questions

[all2neat]

Hello,

I'm looking to teach myself managed C++. I'm trying to make a simple
application. How do I import the number from a text box into a variable
of data type long.

in vb i would do something like

dim var as long
var = textbox.text


and it would work. Now when i do in C++
long Number = 0;
Number = txtNum->Text;

I get errors stating that it can't convert from string to int. any
suggestions on how to do this?

 

[Alf P. Steinbach]

* all2neat:
[snip]

I get errors stating that it can't convert from string to int. any
suggestions on how to do this?

E.g. boost::lexical_cast (see www.boost.org).

Or, you can use a std::istringstream yourself.

Or, you can use the C library's functions, or whatever conversion
function you find most convenient.


PS: Please note that Managed C++ is outside the scope of this newsgroup.
Happily your question turned out to have nothing to do with Managed
C++, and so I could answer it in good conscience. Also, slightly
off-topic, note that Managed C++ has been supplanted by C++/CLI.

 

[EventHelix.com]

This would be off topic here.

Try the newsgroup:

microsoft.public.dotnet.languages.vc newsgroup.

 

[all2neat]

Thanks to both.

 

[roberts.noah]

Hello,

I'm looking to teach myself managed C++.

Managed C++ and actual C++ have little in common; they are not the same
language. Here we talk about C++, not MS's bastardization of it. Any
answer you get here is likely to be completely unbeneficial to you. Go
to a microsoft .net newsgroup.

 

[Tomás]

all2neat posted:

Hello,

I'm looking to teach myself managed C++. I'm trying to make a simple
application. How do I import the number from a text box into a variable
of data type long.

in vb i would do something like

dim var as long
var = textbox.text


and it would work. Now when i do in C++
long Number = 0;
Number = txtNum->Text;

I get errors stating that it can't convert from string to int. any
suggestions on how to do this?

Looks like you're using something like MFC.

I only every use the Windows API directly, so I'd probably use GetDlgItemInt
or GetDlgItemText.

You'll get much greater help on a Windows specific programming newsgroup.


-Tomás