[C]Convert Char* to Unsigned Long

[MaSSaSLaYeR]

Hello!

How can I convert char* to unsigned long?

When I try it with

atol()

it gives wrong the conversion.

And

(unsigned)atol()

gives the wrong conversion also.

char *test =  "3232235876";
unsigned long numeric_ip =  atol(test) ;

PS: It needs to be exactly the same value.

Thanks a lot

Greetz!

[laserlight]

Check out strtoul instead. It allows for error checking too.

[MaSSaSLaYeR]

Check out strtoul instead. It allows for error checking too.

Does that work under windows 2?

I taught it only worked with Linux and isn't it C++?

[laserlight]

Does that work under windows 2?

I do not know. Why are you using such an old version of Windows, anyway?

I taught it only worked with Linux and isn't it C++?

I don't have my copy of C99 with me right now, but I would not teach that it only works with Linux since I believe that it is part of the C standard library.

[MaSSaSLaYeR]

I do not know. Why are you using such an old version of Windows, anyway?


I don't have my copy of C99 with me right now, but I would not teach that it only works with Linux since I believe that it is part of the C standard library.

This worked thank you

(unsigned) strtoul(test,NULL,10);

[laserlight]

You're welcome, though I don't think you want the cast to unsigned as you are actually casting from unsigned long to unsigned int, only to assign to unsigned long.

[CommonTater]

Half your problem is the number itself... 3,232,235,876 is too big for a 32 bit integer.

[Adak]

OK, but which half is it?

A 4 byte unsigned int would be OK, but not a signed int:
UINT_MAX: 4 294 967 295 * print with %u *

[laserlight]

Half your problem is the number itself... 3,232,235,876 is too big for a 32 bit integer.

It is in range of unsigned long though, which I think is the idea, otherwise conversion to long first would work.

[MaSSaSLaYeR]

I never had these kind of problems in VB.net =(

[CommonTater]

I never had these kind of problems in VB.net =(

Because you were being babysat by .NET which hides considerable detail from a programmer. Now you are seeing all the "behind the scenes" stuff. It's not a problem, it's merely a higher level of exposure to the real work being done.