Re: converting numbers
hi Ship's Log, Lt. David Stern, Stardate 280199.1148: OK, hex numbers are radix 16, octal radix 8, decimal radix 1. As mentioned in an other mail, it's 10. There are no base 1 #s @all as 1^r for all r is still 1 (besids you have always base# of digits starting with 0) Good. Now I can convert between hex, octal and decimal. To extend yer knowledge ;-) you can always do a # mod base ; # - # div base Which will give you digit fer digit starting with the lowest one. (Thell me if I abreviate 2 much :) I guess I'll have to determine when to use each based on context. That is easy. Hex have capital letters, octals are 3 digits and start with a \ deciaml numbers are stored in i or o, binaries are just logical. Besids these noone in there right mind uses any and whoever starts base 7 will be shot anyway. Thanks! Now, where is that coffee? :-) Ah, can I have tea instead? A hot, black tea without any milk or sugar. :-) Greetings -- Alexander N. Benner; [EMAIL PROTECTED]; [EMAIL PROTECTED] (#Hosanna #IXThYS) PROVERBS 30:4 Who hath ascended up into heaven, or descended? Who hath gathered the wind in His fists? Who hath bound the waters in a garment? Who hath established all the ends of the earth? What is His name, and what is His son's name, if thou canst tell ?
Re: converting numbers
Where's the FM that tells how to convert numbers, like 0x11A to a
decimal?
You'll find it in any C manual, or try man strtol for the strtol() function.
If all you want is to convert to decimal, use this short C-program:
#include stdio.h
void main(int argc, char **argv)
{
while (*++argv) printf(%s == %i\n, *argv, strtol(*argv));
}
It simply prints all arguments as decimal numbers. To use it, save it as
decimal.c Then run gcc -O2 decimal.c and mv a.out decimal
Possibly also chmod oug+rx decimal
You can now use commands like ./decimal 25 0xFF 011 and get
25 == 25
0xFF == 255
011 == 9
The first one was an ordinary number, the other hexadecimal and the third one
octal.
Helge Hafting
Re: converting numbers
If all you want is to convert to decimal, use this short C-program:
#include stdio.h
void main(int argc, char **argv)
This is undefined. main should return an int.
{
while (*++argv) printf(%s == %i\n, *argv, strtol(*argv));
exit(EXIT_SUCCESS);
}
Matthew
--
Elen sila lumenn' omentielvo
[EMAIL PROTECTED],
Steward of the Cambridge Tolkien Society
Selwyn College Computer Support
http://www.cam.ac.uk/CambUniv/Societies/tolkien/
http://pick.sel.cam.ac.uk/
Re: converting numbers
Where's the FM that tells how to convert numbers, like 0x11A to a decimal? I use 'dc' for this sort of task, for example: plum:~$ dc Invoke the program 16 push 16 on the stack i pop 16 from the stack and set it as the input radix 11A push 0x11A on the stack p print the top number on the stack 282 by default, output radix is 10 One can go on and display the number in other radices (sp?): 8 push 8 o set output radix p print 432 here it is in octal 2 push 2 o set output radix p print 100011010 and now in binary q all done plum:~$ 'dc' has a good man page - and it's fun too! Michael
Re: converting numbers
At 11:48 AM 1/28/99 -0800, David Stern wrote: On Thu, 28 Jan 1999 12:17:34 CST, Andrew Ivanov wrote: Howdy, Where's the FM that tells how to convert numbers, like 0x11A to a decimal? 0x11A is in hex, and to convert it to dec is 1*16^2 + 1*16^1 +10*16^0 (A=10,B=11, C=12, D=13, E=14, F=15) I should never have asked this question before having some coffee. :-) I may be wrong, but I think octal is in x0# format, so that 0x0300 would be an octal number. To convert that to dec is just 3*8^2+0*8^1+0*8^0, and ignore the leading 0 after x, which is used to idenbtify the radix. OK, hex numbers are radix 16, octal radix 8, decimal radix 1. So, a leading 0x indicates hex, and a leading 0 traditionally indicates octal, although the latter may require contextual information to distinguish between decimal, which should not be written with a leading zero, if I read Henning Makholm correctly (thanks Henning!), and I'll disregard the mention of binary. Good. Now I can convert between hex, octal and decimal. I guess I'll have to determine when to use each based on context. Thanks! Now, where is that coffee? :-) http://amelia.experiment.db.erau.edu/ldp/HOWTO/mini/Coffee.html -- David [EMAIL PROTECTED] -- Unsubscribe? mail -s unsubscribe [EMAIL PROTECTED] /dev/null
converting numbers
Howdy, Where's the FM that tells how to convert numbers, like 0x11A to a decimal? I think there are a few common formats of numbers and I'd like to be able to recognize them and transpose them, but I don't know where to look. Thanks, -- David [EMAIL PROTECTED]
Re: converting numbers
On Thu, Jan 28, 1999 at 11:57:54AM -0600, David Stern wrote this: Where's the FM that tells how to convert numbers, like 0x11A to a decimal? 0x0123 is if i don't reccall wrong the way to represent an octal number. In that case you get it's decimal number this way. 123 base 8 is (3*8^0 + 2*8^1 + 1*8^2 = 3*1 + 2*8 + 1*64 = 83) base 10 Hope this helps you understand. Regards // Marwin -- | Björn Elwhagen aka Marwin Finger [EMAIL PROTECTED] | | Student at Wexio University for PGP public key. | | SwedenICQ: 356095 |
Re: converting numbers
Howdy, Where's the FM that tells how to convert numbers, like 0x11A to a decimal? 0x11A is in hex, and to convert it to dec is 1*16^2 + 1*16^1 +10*16^0 (A=10,B=11, C=12, D=13, E=14, F=15) I may be wrong, but I think octal is in x0# format, so that 0x0300 would be an octal number. To convert that to dec is just 3*8^2+0*8^1+0*8^0, and ignore the leading 0 after x, which is used to idenbtify the radix. Binary...well, is binary. HTH, Andrew Never include a comment that will help | Andrew Ivanov someone else understand your code. | [EMAIL PROTECTED] If they understand it, they don't | ICQ: 12402354 need you. |
Re: converting numbers
Björn Elwhagen [EMAIL PROTECTED] writes: 0x0123 is if i don't reccall wrong the way to represent an octal number. No. 0x always means that a hexadecimal number follows. Ocal is traditionally indicated by having a leading zero but no x. Outside contexts where one KNOWS that this convention is or is not followed, it cannot be advised to write numbers with leading zeroes. -- Henning Makholm http://www.diku.dk/students/makholm
Re: converting numbers
On Thu, 28 Jan 1999 12:17:34 CST, Andrew Ivanov wrote: Howdy, Where's the FM that tells how to convert numbers, like 0x11A to a decimal? 0x11A is in hex, and to convert it to dec is 1*16^2 + 1*16^1 +10*16^0 (A=10,B=11, C=12, D=13, E=14, F=15) I should never have asked this question before having some coffee. :-) I may be wrong, but I think octal is in x0# format, so that 0x0300 would be an octal number. To convert that to dec is just 3*8^2+0*8^1+0*8^0, and ignore the leading 0 after x, which is used to idenbtify the radix. OK, hex numbers are radix 16, octal radix 8, decimal radix 1. So, a leading 0x indicates hex, and a leading 0 traditionally indicates octal, although the latter may require contextual information to distinguish between decimal, which should not be written with a leading zero, if I read Henning Makholm correctly (thanks Henning!), and I'll disregard the mention of binary. Good. Now I can convert between hex, octal and decimal. I guess I'll have to determine when to use each based on context. Thanks! Now, where is that coffee? :-) -- David [EMAIL PROTECTED]
Re: converting numbers
Thanks for the correction: 0x is hex, 0 is octal. OK, hex numbers are radix 16, octal radix 8, decimal radix 1. No, decimal is radix 10 (base 10). Binary is base 2. I guess I'll have to determine when to use each based on context. In written language the base is used as a subsript to the number, so that you know what number system you work in. Thanks! Now, where is that coffee? :-) Mcoffee. Never include a comment that will help | Andrew Ivanov someone else understand your code. | [EMAIL PROTECTED] If they understand it, they don't | ICQ: 12402354 need you. |
Re: converting numbers
David Stern wrote: Where's the FM that tells how to convert numbers, like 0x11A to a decimal? This is in base 16, so: [EMAIL PROTECTED]:~bc ... ibase=16 11A 282-- result quit -- see shy jo
Re: converting numbers
On Thu, Jan 28, 1999 at 04:19:10PM -0600, Joey Hess wrote this: David Stern wrote: Where's the FM that tells how to convert numbers, like 0x11A to a decimal? This is in base 16, so: Hm...i obvilously didn't even look hard enough at the number given since i didn't even notice the A...my fault...my tired eyes decieved me... ;) Regards // Marwin -- | Björn Elwhagen aka Marwin Finger [EMAIL PROTECTED] | | Student at Wexio University for PGP public key. | | SwedenICQ: 356095 |
