simple question

[ya0037]

Hi,

I am very new in c++ so excuse me for my question.

Please sb kindly tell me what does the below sentence means?

static const unsigned int d1=0xDEADBEEF ^ (0x1fc4ce47*(d^(d>>13)));

My question is about what is 0xDEADBEEF or 0x1fc4ce47 ?
If I want to write a description for this so any programmer no matter what kind of language he or she uses can implement this, what should I say?

Kind regards,

 

[ya0037]

Sorry I also have another question:

static const unsigned int oWeylOffset=0x8009d14b;

what does the above expression means?

I know the whole meaning of that, my question arises from that I have read that:

unsigned int is 4 Bytes precision but the above number is more than the range of 4 bytes precision integer it is something like 16 Bytes.

You know the problem is that I am a Fortran programmer and here at c++ I am totally confused. If I want to write the above expression in Fortran
Writing the 4 bytes precision is not working

Integer(Kind = 4), Parameter :: oWeylOffset = Z'8009d14b'

So, I have to write :

Integer(Kind = 16), Parameter :: oWeylOffset = Z'8009d14b'

less than this precision the code will be stopped with error.

Any idea? Please help me through this, as the manual says that unsigned int is 4 Bytes precision, how is it possible.

Cheers,

 

[feherke]

Hi

That value perfectly feets 4 bytes :
[tt]static const unsigned int oWeylOffset=0x[highlight #fcc]80[/highlight][highlight #cfc]09[/highlight][highlight #ccf]d1[/highlight][highlight #ffc]4b[/highlight];[/tt]

4 bytes can hold values in range 0..4[small] [/small]294[small] [/small]967[small] [/small]295, more than enough for 2[small] [/small]148[small] [/small]127[small] [/small]051.

My question is about what is 0xDEADBEEF or 0x1fc4ce47 ?

Now after your second question I have the feeling you are confused by C's hexadecimal notation. The "0x" prefix means the following number is represented in base 16. So 0xDEADBEEF = 3[small] [/small]735[small] [/small]928[small] [/small]559 and 0x1fc4ce47 = 532[small] [/small]991[small] [/small]559.


Feherke.

http://free.rootshell.be/~feherke/