structs

[john tindell]

#include <iostream.h>

struct database
{
	int USER_ID;
};
int main()

{
	database users;
	users.USER_ID=110;
		cout<<users.USER_ID;
	return 0;
}

heres my code, now this out puts 110, but when ui change users.USER_ID to 0110 it outputs 72????

im news to c++ so forgive me for the stupid question

Thanks

[parksie]

Firstly, <iostream>, not <iostream.h>

As far as your numbers go, you've hit another intricacy inherited from C. When you give a number that begins with 0, it interprets it as Octal. I.e., 110 will be 110, but 0110 will be 110 octal, which is 72 decimal (check it on a calculator to see).

[john tindell]

wats an octal???

[parksie]

It's another number base. We have decimal (base 10, should be denary but hey ) which uses digits 0 to 9. Hexadecimal uses 0-9, A-F. Octal uses 0-7.

[john tindell]

gotya, o btw
when i use

#include <iostream>

i get the error

c:\C++\structures\source1.cpp(12): error C2065: 'cout' : undeclared identifier

but i only get a warning when i use

#include <iostream.h>

c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\useoldio.h(29): warning C4995: '_OLD_IOSTREAMS_ARE_DEPRECATED': name was marked as #pragma deprecated

? any ideas about thats


Thanks for the Help

[parksie]

Heh, the warning about the other one tells you enough: the old ones are deprecated.

To use the new ones, they're all in the std namespace. So for simplicity, add a "using namespace std;" into the top of your source file, but after the includes.

[john tindell]

cheers

[parksie]

Nps