Splitting a numbers binary representation for a double. Post: 302665447

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Homework and Emergencies Homework & Coursework Questions Splitting a numbers binary representation for a double. Post 302665447 by robin_simple on Monday 2nd of July 2012 09:38:27 PM

07-02-2012

Registered User

Code:

#include <iostream>
#include <stdlib.h>
using namespace std;

int main()
{
        char *hex_key = "abcdef012345678";
        long long key = strtoll( hex_key, NULL, 16 );

        cout << key << endl;
}

on compilation:
g++ b.cpp
b.cpp: In function ‘int main()’:
b.cpp:7: warning: deprecated conversion from string constant to ‘char*’

output:
./a.out
773738358679819896

Is there anything I can do to get rid of the warning?

Also, the full hex_key is 9abcdef012345678 which is different from what I used in the above code because of the 9 at the beginning. The output of this is 9223372036854775807
which is different from a result shown on a webpage that calculates hexadecimal numbers. All the outputs for the other hex_key values are consistent with the calculating website. Why is this number different?

Also, in your first reply you gave me

Code:

unsigned char *cval = "123";
    int val = 0;
    int i;

    for( i = 0; i < strlen( cval ); i++ )
    {
        val <<= 4;
        val += cval[i] - '0';
    }
    printf( "%x\n", val );

and I am wondering why you subtract '0' and why you shift 4. Is it necessary to shift << by four each time you add a new hex digit?

---------- Post updated at 08:38 PM ---------- Previous update was at 12:56 PM ----------

ok, strtoull() was the function that gets the whole 16 hex digits. the unsigned long long type was what I should have been using.

robin_simple

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lmfsetup

lmfsetup(8) System Manager's Manual lmfsetup(8)

Name
lmfsetup - License Management Facility PAK registration script

Syntax
/etc/lmfsetup [ template ]

Description
The script allows you to register data supplied by a Product Authorization Key (PAK). The script prompts you for the data associated with
each of the fields on a PAK. When all the data has been entered, the License Management Facility (LMF) ensures there are entries against
all the mandatory fields, and that the Checksum validates all the license data. If the data has been entered correctly, the PAK is regis-
tered in the License Database. If the data has been entered incorrectly, the appropriate error message is displayed and you are given the
opportunity to re-enter the data.

The template option allows you to register license data from templates in A template containing a partially complete PAK is created by some
products as part of their installation process. The script only prompts you for data on the fields that are empty in the template. If the
script cannot find the specified template in it searches the current directory.

The script is provided as an alternative to the command. This displays a template, which includes the fields on the PAK, and invokes an
editor so that you can add the license data to the appropriate field. The command also allows errors to be corrected without having to re-
enter all the data.

See Also
lmf(8)
Guide to Software Licensing

lmfsetup(8)